-
Notifications
You must be signed in to change notification settings - Fork 526
/
user.js
2268 lines (2205 loc) · 137 KB
/
user.js
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/******
* name: ghacks user.js
* date: 17 January 2019
* version 65-alpha: Dancing with My Pants
* "If I had the chance, I'd ask the world to dance, and I'll be dancing with my pants"
* authors: v52+ github | v51- www.ghacks.net
* url: https://github.com/ghacksuserjs/ghacks-user.js
* license: MIT: https://github.com/ghacksuserjs/ghacks-user.js/blob/master/LICENSE.txt
* releases: These are end-of-stable-life-cycle legacy archives.
*Always* use the master branch user.js for a current up-to-date version.
url: https://github.com/ghacksuserjs/ghacks-user.js/releases
* README:
0. Consider using Tor Browser if it meets your needs or fits your threat model better
* https://www.torproject.org/about/torusers.html.en
1. READ the full README
* https://github.com/ghacksuserjs/ghacks-user.js/blob/master/README.md
2. READ this
* https://github.com/ghacksuserjs/ghacks-user.js/wiki/1.3-Implementation
3. If you skipped steps 1 and 2 above (shame on you), then here is the absolute minimum
* Auto-installing updates for Firefox and extensions are disabled (section 0302's)
* Some user data is erased on close (section 2800). Change this to suit your needs
* EACH RELEASE check:
- 4600s: reset prefs made redundant due to privacy.resistFingerprinting (RPF)
or enable them as an alternative to RFP or for ESR users
- 9999s: reset deprecated prefs in about:config or enable relevant section(s) for ESR
* Site breakage WILL happen
- There are often trade-offs and conflicts between Security vs Privacy vs Anti-Fingerprinting
and these need to be balanced against Functionality & Convenience & Breakage
* You will need to make changes, and to troubleshoot at times (choose wisely, there is always a trade-off).
While not 100% definitive, search for "[SETUP". If required, add each pref to your overrides section at
default values (or comment them out and reset them in about:config). Here are the main ones:
[SETUP-WEB] can cause some websites to break
[SETUP-CHROME] changes how Firefox itself behaves (i.e. NOT directly website related)
[SETUP-PERF] may impact performance
* [WARNING] tags are extra special and used sparingly, so heed them
4. BACKUP your profile folder before implementing (and/or test in a new/cloned profile)
5. KEEP UP TO DATE: https://github.com/ghacksuserjs/ghacks-user.js/wiki#small_orange_diamond-maintenance
* INDEX:
0100: STARTUP
0200: GEOLOCATION
0300: QUIET FOX
0400: BLOCKLISTS / SAFE BROWSING / TRACKING PROTECTION
0500: SYSTEM ADD-ONS / EXPERIMENTS
0600: BLOCK IMPLICIT OUTBOUND
0700: HTTP* / TCP/IP / DNS / PROXY / SOCKS etc
0800: LOCATION BAR / SEARCH BAR / SUGGESTIONS / HISTORY / FORMS
0900: PASSWORDS
1000: CACHE / SESSION (RE)STORE / FAVICONS
1200: HTTPS (SSL/TLS / OCSP / CERTS / HPKP / CIPHERS)
1400: FONTS
1600: HEADERS / REFERERS
1700: CONTAINERS
1800: PLUGINS
2000: MEDIA / CAMERA / MIC
2200: WINDOW MEDDLING & LEAKS / POPUPS
2300: WEB WORKERS
2400: DOM (DOCUMENT OBJECT MODEL) & JAVASCRIPT
2500: HARDWARE FINGERPRINTING
2600: MISCELLANEOUS
2700: PERSISTENT STORAGE
2800: SHUTDOWN
4000: FPI (FIRST PARTY ISOLATION)
4500: RFP (RESIST FINGERPRINTING)
4600: RFP ALTERNATIVES
4700: RFP ALTERNATIVES (NAVIGATOR / USER AGENT (UA) SPOOFING)
5000: PERSONAL
9999: DEPRECATED / REMOVED / LEGACY / RENAMED
******/
/* START: internal custom pref to test for syntax errors
* [NOTE] In FF60+, not all syntax errors cause parsing to abort i.e. reaching the last debug
* pref no longer necessarily means that all prefs have been applied. Check the console right
* after startup for any warnings/error messages related to non-applied prefs
* [1] https://blog.mozilla.org/nnethercote/2018/03/09/a-new-preferences-parser-for-firefox/ ***/
user_pref("_user.js.parrot", "START: Oh yes, the Norwegian Blue... what's wrong with it?");
/*** [SECTION 0100]: STARTUP ***/
user_pref("_user.js.parrot", "0100 syntax error: the parrot's dead!");
/* 0101: disable default browser check
* [SETTING] General>Startup>Always check if Firefox is your default browser ***/
user_pref("browser.shell.checkDefaultBrowser", false);
/* 0102: set START page (0=blank, 1=home, 2=last visited page, 3=resume previous session)
* [NOTE] Session Restore is not used in PB mode (0110) and is cleared with history (2803, 2804)
* [SETTING] General>Startup>Restore previous session ***/
user_pref("browser.startup.page", 0);
/* 0103: set HOME+NEWWINDOW page
* about:home=Activity Stream (default, see 0105), custom URL, about:blank
* [SETTING] Home>New Windows and Tabs>Homepage and new windows ***/
user_pref("browser.startup.homepage", "about:blank");
/* 0104: set NEWTAB page
* true=Activity Stream (default, see 0105), false=blank page
* [SETTING] Home>New Windows and Tabs>New tabs ***/
user_pref("browser.newtabpage.enabled", false);
user_pref("browser.newtab.preload", false);
/* 0105: disable Activity Stream stuff (AS)
* AS is the default homepage/newtab in FF57+, based on metadata and browsing behavior.
* **NOT LISTING ALL OF THESE: USE THE PREFERENCES UI**
* [SETTING] Home>Firefox Home Content>... to show/hide what you want ***/
/* 0105a: disable Activity Stream telemetry ***/
user_pref("browser.newtabpage.activity-stream.feeds.telemetry", false);
user_pref("browser.newtabpage.activity-stream.telemetry", false);
user_pref("browser.newtabpage.activity-stream.telemetry.ping.endpoint", "");
/* 0105b: disable Activity Stream Snippets
* Runs code received from a server (aka Remote Code Execution) and sends information back to a metrics server
* [1] https://abouthome-snippets-service.readthedocs.io/ ***/
user_pref("browser.aboutHomeSnippets.updateUrl", "");
user_pref("browser.newtabpage.activity-stream.asrouter.providers.snippets", "");
user_pref("browser.newtabpage.activity-stream.disableSnippets", true);
user_pref("browser.newtabpage.activity-stream.feeds.snippets", false);
/* 0105c: disable Activity Stream Top Stories, Pocket-based and/or sponsored content ***/
user_pref("browser.newtabpage.activity-stream.feeds.section.topstories", false);
user_pref("browser.newtabpage.activity-stream.section.highlights.includePocket", false);
user_pref("browser.newtabpage.activity-stream.showSponsored", false);
/* 0105d: disable Activity Stream recent Highlights in the Library [FF57+] ***/
// user_pref("browser.library.activity-stream.enabled", false);
/* 0110: start Firefox in PB (Private Browsing) mode
* [NOTE] In this mode *all* windows are "private windows" and the PB mode icon is not displayed
* [WARNING] The P in PB mode is misleading: it means no "persistent" local storage of history,
* caches, searches or cookies (which you can achieve in normal mode). In fact, it limits or
* removes the ability to control these, and you need to quit Firefox to clear them. PB is best
* used as a one off window (File>New Private Window) to provide a temporary self-contained
* new instance. Closing all Private Windows clears all traces. Repeat as required. PB also does
* not allow indexedDB which breaks many Extensions that use it including uBlock Origin and uMatrix
* [SETTING] Privacy & Security>History>Custom Settings>Always use private browsing mode
* [1] https://wiki.mozilla.org/Private_Browsing
* [2] https://spreadprivacy.com/is-private-browsing-really-private/ ***/
// user_pref("browser.privatebrowsing.autostart", true);
/*** [SECTION 0200]: GEOLOCATION ***/
user_pref("_user.js.parrot", "0200 syntax error: the parrot's definitely deceased!");
/* 0201: disable Location-Aware Browsing
* [1] https://www.mozilla.org/firefox/geolocation/ ***/
// user_pref("geo.enabled", false);
/* 0201b: set a default permission for Location [FF58+]
* 0=always ask (default), 1=allow, 2=block
* [NOTE] Best left at default "always ask", fingerprintable via Permissions API
* [SETTING] to add site exceptions: Page Info>Permissions>Access Your Location
* [SETTING] to manage site exceptions: Options>Privacy & Security>Permissions>Location>Settings ***/
// user_pref("permissions.default.geo", 2);
/* 0202: disable GeoIP-based search results
* [NOTE] May not be hidden if Firefox has changed your settings due to your locale
* [1] https://trac.torproject.org/projects/tor/ticket/16254
* [2] https://support.mozilla.org/en-US/kb/how-stop-firefox-making-automatic-connections#w_geolocation-for-default-search-engine ***/
user_pref("browser.search.region", "US"); // [HIDDEN PREF]
user_pref("browser.search.geoip.url", "");
/* 0205: set OS & APP locale [FF59+]
* If set to empty, the OS locales are used. If not set at all, default locale is used ***/
user_pref("intl.locale.requested", "en-US"); // [HIDDEN PREF]
/* 0206: disable geographically specific results/search engines e.g. "browser.search.*.US"
* i.e. ignore all of Mozilla's various search engines in multiple locales ***/
user_pref("browser.search.geoSpecificDefaults", false);
user_pref("browser.search.geoSpecificDefaults.url", "");
/* 0207: set language to match ***/
user_pref("intl.accept_languages", "en-US, en");
/* 0208: enforce US English locale regardless of the system locale
* [1] https://bugzilla.mozilla.org/867501 ***/
user_pref("javascript.use_us_english_locale", true); // [HIDDEN PREF]
/* 0209: use APP locale over OS locale in regional preferences [FF56+]
* [1] https://bugzilla.mozilla.org/buglist.cgi?bug_id=1379420,1364789 ***/
user_pref("intl.regional_prefs.use_os_locales", false);
/* 0210: use Mozilla geolocation service instead of Google when geolocation is enabled
* Optionally enable logging to the console (defaults to false) ***/
user_pref("geo.wifi.uri", "https://location.services.mozilla.com/v1/geolocate?key=%MOZILLA_API_KEY%");
// user_pref("geo.wifi.logging.enabled", true); // [HIDDEN PREF]
/* 0211: disable using the OS's geolocation service ***/
user_pref("geo.provider.ms-windows-location", false); // [WINDOWS]
user_pref("geo.provider.use_corelocation", false); // [MAC]
user_pref("geo.provider.use_gpsd", false); // [LINUX]
/*** [SECTION 0300]: QUIET FOX
We choose to not disable auto-CHECKs (0301's) but to disable auto-INSTALLs (0302's).
There are many legitimate reasons to turn off auto-INSTALLS, including hijacked or
monetized extensions, time constraints, legacy issues, and fear of breakage/bugs.
It is still important to do updates for security reasons, please do so manually. ***/
user_pref("_user.js.parrot", "0300 syntax error: the parrot's not pinin' for the fjords!");
/* 0301b: disable auto-update checks for extensions
* [SETTING] about:addons>Extensions>[cog-wheel-icon]>Update Add-ons Automatically (toggle) ***/
// user_pref("extensions.update.enabled", false);
/* 0302a: disable auto update installing for Firefox [NON-WINDOWS FF65+]
* [NOTE] In FF65+ on Windows this SETTING (below) is now stored in a file and the pref was removed
* [SETTING] General>Firefox Updates>Check for updates but let you choose... ***/
user_pref("app.update.auto", false);
/* 0302b: disable auto update installing for extensions (after the check in 0301b)
* [SETTING] about:addons>Extensions>[cog-wheel-icon]>Update Add-ons Automatically (toggle) ***/
user_pref("extensions.update.autoUpdateDefault", false);
/* 0303: disable background update service [WINDOWS]
* [SETTING] General>Firefox Updates>Use a background service to install updates ***/
user_pref("app.update.service.enabled", false);
/* 0304: disable background update staging ***/
user_pref("app.update.staging.enabled", false);
/* 0305: enforce update information is displayed
* This is the update available, downloaded, error and success information ***/
user_pref("app.update.silent", false);
/* 0306: disable extension metadata
* used when installing/updating an extension, and in daily background update checks: if false, it
* hides the expanded text description (if it exists) when you "show more details about an addon" ***/
// user_pref("extensions.getAddons.cache.enabled", false);
/* 0307: disable auto updating of personas (themes) ***/
user_pref("lightweightThemes.update.enabled", false);
/* 0308: disable search update
* [SETTING] General>Firefox Updates>Automatically update search engines ***/
user_pref("browser.search.update", false);
/* 0309: disable sending Flash crash reports ***/
user_pref("dom.ipc.plugins.flash.subprocess.crashreporter.enabled", false);
/* 0310: disable sending the URL of the website where a plugin crashed ***/
user_pref("dom.ipc.plugins.reportCrashURL", false);
/* 0320: disable about:addons' Get Add-ons panel (uses Google Analytics) ***/
user_pref("extensions.getAddons.showPane", false); // [HIDDEN PREF]
user_pref("extensions.webservice.discoverURL", "");
/* 0330: disable telemetry
* the pref (.unified) affects the behaviour of the pref (.enabled)
* IF unified=false then .enabled controls the telemetry module
* IF unified=true then .enabled ONLY controls whether to record extended data
* so make sure to have both set as false
* [NOTE] FF58+ `toolkit.telemetry.enabled` is now LOCKED to reflect prerelease
* or release builds (true and false respectively), see [2]
* [1] https://firefox-source-docs.mozilla.org/toolkit/components/telemetry/telemetry/internals/preferences.html
* [2] https://medium.com/georg-fritzsche/data-preference-changes-in-firefox-58-2d5df9c428b5 ***/
user_pref("toolkit.telemetry.unified", false);
user_pref("toolkit.telemetry.enabled", false); // see [NOTE] above FF58+
user_pref("toolkit.telemetry.server", "data:,");
user_pref("toolkit.telemetry.archive.enabled", false);
user_pref("toolkit.telemetry.cachedClientID", "");
user_pref("toolkit.telemetry.newProfilePing.enabled", false); // [FF55+]
user_pref("toolkit.telemetry.shutdownPingSender.enabled", false); // [FF55+]
user_pref("toolkit.telemetry.updatePing.enabled", false); // [FF56+]
user_pref("toolkit.telemetry.bhrPing.enabled", false); // [FF57+] Background Hang Reporter
user_pref("toolkit.telemetry.firstShutdownPing.enabled", false); // [FF57+]
user_pref("toolkit.telemetry.hybridContent.enabled", false); // [FF59+]
/* 0331: disable Telemetry Coverage
* [1] https://blog.mozilla.org/data/2018/08/20/effectively-measuring-search-in-firefox/ ***/
user_pref("toolkit.telemetry.coverage.opt-out", true); // [HIDDEN PREF]
user_pref("toolkit.coverage.opt-out", true); // [FF64+] [HIDDEN PREF]
user_pref("toolkit.coverage.endpoint.base", "");
/* 0340: disable Health Reports
* [SETTING] Privacy & Security>Firefox Data Collection & Use>Allow Firefox to send technical... data ***/
user_pref("datareporting.healthreport.uploadEnabled", false);
/* 0341: disable new data submission, master kill switch [FF41+]
* If disabled, no policy is shown or upload takes place, ever
* [1] https://bugzilla.mozilla.org/1195552 ***/
user_pref("datareporting.policy.dataSubmissionEnabled", false);
/* 0342: disable Studies (see 0503)
* [NOTE] This pref has no effect when Health Reports (0340) are disabled
* [SETTING] Privacy & Security>Firefox Data Collection & Use>...>Allow Firefox to install and run studies ***/
user_pref("app.shield.optoutstudies.enabled", false);
/* 0343: disable Extension Recommendations in about:addons and AMO [FF65+]
* [NOTE] This pref has no effect when Health Reports (0340) are disabled
* [SETTING] Privacy & Security>Firefox Data Collection & Use>...>Allow Firefox to make personalized extension rec.
* [1] https://support.mozilla.org/kb/personalized-extension-recommendations ***/
user_pref("browser.discovery.enabled", false);
/* 0350: disable Crash Reports ***/
user_pref("breakpad.reportURL", "");
user_pref("browser.tabs.crashReporting.sendReport", false); // [FF44+]
user_pref("browser.crashReports.unsubmittedCheck.enabled", false); // [FF51+]
/* 0351: disable backlogged Crash Reports
* [SETTING] Privacy & Security>Firefox Data Collection & Use>Allow Firefox to send backlogged crash reports ***/
user_pref("browser.crashReports.unsubmittedCheck.autoSubmit2", false); // [FF58+]
/* 0370: disable Pocket [FF46+]
* Pocket is a third party (now owned by Mozilla) "save for later" cloud service
* [1] https://en.wikipedia.org/wiki/Pocket_(application)
* [2] https://www.gnu.gl/blog/Posts/multiple-vulnerabilities-in-pocket/ ***/
user_pref("extensions.pocket.enabled", false);
/* 0380: disable Browser Error Reporter [FF60+]
* [1] https://support.mozilla.org/en-US/kb/firefox-nightly-error-collection
* [2] https://firefox-source-docs.mozilla.org/browser/browser/BrowserErrorReporter.html ***/
user_pref("browser.chrome.errorReporter.enabled", false);
user_pref("browser.chrome.errorReporter.submitUrl", "");
/* 0390: disable Captive Portal detection
* [1] https://en.wikipedia.org/wiki/Captive_portal
* [2] https://wiki.mozilla.org/Necko/CaptivePortal
* [3] https://trac.torproject.org/projects/tor/ticket/21790 ***/
user_pref("captivedetect.canonicalURL", "");
user_pref("network.captive-portal-service.enabled", false); // [FF52+]
/* 0391: disable Network Connectivity checks [FF65+]
* [1] https://bugzilla.mozilla.org/1460537 ***/
user_pref("network.connectivity-service.enabled", false);
/*** [SECTION 0400]: BLOCKLISTS / SAFE BROWSING / TRACKING PROTECTION
This section has security & tracking protection implications vs privacy concerns vs effectiveness
vs 3rd party 'censorship'. We DO NOT advocate no protection. If you disable Tracking Protection (TP)
and/or Safe Browsing (SB), then SECTION 0400 REQUIRES YOU HAVE uBLOCK ORIGIN INSTALLED.
Safe Browsing is designed to protect users from malicious sites. Tracking Protection is designed
to lessen the impact of third parties on websites to reduce tracking and to speed up your browsing.
These do rely on 3rd parties (Google for SB and Disconnect for TP), but many steps, which are
continually being improved, have been taken to preserve privacy. Disable at your own risk.
***/
user_pref("_user.js.parrot", "0400 syntax error: the parrot's passed on!");
/** BLOCKLISTS ***/
/* 0401: enable Firefox blocklist, but sanitize blocklist url
* [NOTE] It includes updates for "revoked certificates"
* [1] https://blog.mozilla.org/security/2015/03/03/revoking-intermediate-certificates-introducing-onecrl/
* [2] https://trac.torproject.org/projects/tor/ticket/16931 ***/
user_pref("extensions.blocklist.enabled", true); // [DEFAULT: true]
user_pref("extensions.blocklist.url", "https://blocklists.settings.services.mozilla.com/v1/blocklist/3/%APP_ID%/%APP_VERSION%/");
/* 0403: disable individual unwanted/unneeded parts of the Kinto blocklists
* What is Kinto?: https://wiki.mozilla.org/Firefox/Kinto#Specifications
* As Firefox transitions to Kinto, the blocklists have been broken down into entries for certs to be
* revoked, extensions and plugins to be disabled, and gfx environments that cause problems or crashes ***/
// user_pref("services.blocklist.onecrl.collection", ""); // revoked certificates
// user_pref("services.blocklist.addons.collection", "");
// user_pref("services.blocklist.plugins.collection", "");
// user_pref("services.blocklist.gfx.collection", "");
/** SAFE BROWSING (SB)
This sub-section has been redesigned to differentiate between "real-time"/"user initiated" data
being sent to Google from all other settings such as using local blocklists/whitelists and updating
those lists. There are NO privacy issues here. *IF* required, a full url is never sent to Google,
only a PART-hash of the prefix, and this is hidden with noise of other real PART-hashes. Google also
swear it is anonymized and only used to flag malicious sites/activity. Firefox also takes measures
such as striping out identifying parameters and storing safe browsing cookies in a separate jar.
SB v4 (FF57+) doesn't even use cookies. (#Turn on browser.safebrowsing.debug to monitor this activity)
#Required reading [#] https://feeding.cloud.geek.nz/posts/how-safe-browsing-works-in-firefox/
[1] https://wiki.mozilla.org/Security/Safe_Browsing ***/
/* 0410: disable "Block dangerous and deceptive content"
* This covers deceptive sites such as phishing and social engineering
* [SETTING] Privacy & Security>Security>Deceptive Content and Software Protection ***/
// user_pref("browser.safebrowsing.malware.enabled", false);
// user_pref("browser.safebrowsing.phishing.enabled", false); // [FF50+]
/* 0411: disable "Block dangerous downloads"
* This covers malware and PUPs (potentially unwanted programs)
* [SETTING] Privacy & Security>Security>Deceptive Content and Software Protection ***/
// user_pref("browser.safebrowsing.downloads.enabled", false);
/* 0412: disable "Warn me about unwanted and uncommon software"
* [SETTING] Privacy & Security>Security>Deceptive Content and Software Protection ***/
// user_pref("browser.safebrowsing.downloads.remote.block_potentially_unwanted", false); // [FF48+]
// user_pref("browser.safebrowsing.downloads.remote.block_uncommon", false); // [FF48+]
// user_pref("browser.safebrowsing.downloads.remote.block_dangerous", false); // [FF49+]
// user_pref("browser.safebrowsing.downloads.remote.block_dangerous_host", false); // [FF49+]
/* 0413: disable Google safebrowsing updates ***/
// user_pref("browser.safebrowsing.provider.google.updateURL", "");
// user_pref("browser.safebrowsing.provider.google.gethashURL", "");
// user_pref("browser.safebrowsing.provider.google4.updateURL", ""); // [FF50+]
// user_pref("browser.safebrowsing.provider.google4.gethashURL", ""); // [FF50+]
/* 0414: disable binaries NOT in local lists being checked by Google (real-time checking) ***/
user_pref("browser.safebrowsing.downloads.remote.enabled", false);
user_pref("browser.safebrowsing.downloads.remote.url", "");
/* 0415: disable reporting URLs ***/
user_pref("browser.safebrowsing.provider.google.reportURL", "");
user_pref("browser.safebrowsing.reportPhishURL", "");
user_pref("browser.safebrowsing.provider.google4.reportURL", ""); // [FF50+]
user_pref("browser.safebrowsing.provider.google.reportMalwareMistakeURL", ""); // [FF54+]
user_pref("browser.safebrowsing.provider.google.reportPhishMistakeURL", ""); // [FF54+]
user_pref("browser.safebrowsing.provider.google4.reportMalwareMistakeURL", ""); // [FF54+]
user_pref("browser.safebrowsing.provider.google4.reportPhishMistakeURL", ""); // [FF54+]
/* 0416: disable 'ignore this warning' on Safe Browsing warnings
* If clicked, it bypasses the block for that session. This is a means for admins to enforce SB
* [TEST] see github wiki APPENDIX A: Test Sites: Section 5
* [1] https://bugzilla.mozilla.org/1226490 ***/
// user_pref("browser.safebrowsing.allowOverride", false);
/* 0417: disable data sharing [FF58+] ***/
user_pref("browser.safebrowsing.provider.google4.dataSharing.enabled", false);
user_pref("browser.safebrowsing.provider.google4.dataSharingURL", "");
/** TRACKING PROTECTION (TP)
There are NO privacy concerns here, but we strongly recommend to use uBlock Origin as well,
as it offers more comprehensive and specialized lists. It also allows per domain control. ***/
/* 0420: enable Tracking Protection in all windows
* [NOTE] TP sends DNT headers regardless of the DNT pref (see 1610)
* [1] https://wiki.mozilla.org/Security/Tracking_protection
* [2] https://support.mozilla.org/kb/tracking-protection-firefox ***/
// user_pref("privacy.trackingprotection.pbmode.enabled", true); // [DEFAULT: true]
// user_pref("privacy.trackingprotection.enabled", true);
/* 0422: set which Tracking Protection block list to use
* [WARNING] We don't recommend enforcing this from here, as available block lists can change
* [SETTING] Privacy & Security>Content Blocking>All Detected Trackers>Change block list ***/
// user_pref("urlclassifier.trackingTable", "test-track-simple,base-track-digest256"); // basic
/* 0423: disable Mozilla's blocklist for known Flash tracking/fingerprinting [FF48+]
* [1] https://www.ghacks.net/2016/07/18/firefox-48-blocklist-against-plugin-fingerprinting/
* [2] https://bugzilla.mozilla.org/1237198 ***/
// user_pref("browser.safebrowsing.blockedURIs.enabled", false);
/* 0424: disable Mozilla's tracking protection and Flash blocklist updates ***/
// user_pref("browser.safebrowsing.provider.mozilla.gethashURL", "");
// user_pref("browser.safebrowsing.provider.mozilla.updateURL", "");
/* 0425: disable passive Tracking Protection [FF53+]
* Passive TP annotates channels to lower the priority of network loads for resources on the tracking protection list
* [NOTE] It has no effect if TP is enabled, but keep in mind that by default TP is only enabled in Private Windows
* This is included for people who want to completely disable Tracking Protection.
* [1] https://bugzilla.mozilla.org/buglist.cgi?bug_id=1170190,1141814 ***/
// user_pref("privacy.trackingprotection.annotate_channels", false);
// user_pref("privacy.trackingprotection.lower_network_priority", false);
/*** [SECTION 0500]: SYSTEM ADD-ONS / EXPERIMENTS
System Add-ons are a method for shipping extensions, considered to be
built-in features to Firefox, that are hidden from the about:addons UI.
To view your System Add-ons go to about:support, they are listed under "Firefox Features"
Some System Add-ons have no on-off prefs. Instead you can manually remove them. Note that app
updates will restore them. They may also be updated and possibly restored automatically (see 0505)
* Portable: "...\App\Firefox64\browser\features\" (or "App\Firefox\etc" for 32bit)
* Windows: "...\Program Files\Mozilla\browser\features" (or "Program Files (X86)\etc" for 32bit)
* Mac: "...\Applications\Firefox\Contents\Resources\browser\features\"
[NOTE] On Mac you can right-click on the application and select "Show Package Contents"
* Linux: "/usr/lib/firefox/browser/features" (or similar)
[1] https://firefox-source-docs.mozilla.org/toolkit/mozapps/extensions/addon-manager/SystemAddons.html
[2] https://dxr.mozilla.org/mozilla-central/source/browser/extensions
***/
user_pref("_user.js.parrot", "0500 syntax error: the parrot's cashed in 'is chips!");
/* 0502: disable Mozilla permission to silently opt you into tests ***/
user_pref("network.allow-experiments", false);
/* 0503: disable Normandy/Shield [FF60+]
* Shield is an telemetry system (including Heartbeat) that can also push and test "recipes"
* [1] https://wiki.mozilla.org/Firefox/Shield
* [2] https://github.com/mozilla/normandy ***/
user_pref("app.normandy.enabled", false);
user_pref("app.normandy.api_url", "");
/* 0505: disable System Add-on updates ***/
user_pref("extensions.systemAddon.update.enabled", false); // [FF62+]
user_pref("extensions.systemAddon.update.url", ""); // [FF44+]
/* 0506: disable PingCentre telemetry (used in several System Add-ons) [FF57+]
* Currently blocked by 'datareporting.healthreport.uploadEnabled' (see 0340) ***/
user_pref("browser.ping-centre.telemetry", false);
/* 0515: disable Screenshots
* alternatively in FF60+, disable uploading to the Screenshots server
* [1] https://github.com/mozilla-services/screenshots
* [2] https://www.ghacks.net/2017/05/28/firefox-screenshots-integrated-in-firefox-nightly/ ***/
// user_pref("extensions.screenshots.disabled", true); // [FF55+]
// user_pref("extensions.screenshots.upload-disabled", true); // [FF60+]
/* 0517: disable Form Autofill
* [NOTE] Stored data is NOT secure (uses a JSON file)
* [NOTE] Heuristics controls Form Autofill on forms without @autocomplete attributes
* [SETTING] Privacy & Security>Forms & Passwords>Autofill addresses
* [1] https://wiki.mozilla.org/Firefox/Features/Form_Autofill
* [2] https://www.ghacks.net/2017/05/24/firefoxs-new-form-autofill-is-awesome/ ***/
user_pref("extensions.formautofill.addresses.enabled", false); // [FF55+]
user_pref("extensions.formautofill.available", "off"); // [FF56+]
user_pref("extensions.formautofill.creditCards.enabled", false); // [FF56+]
user_pref("extensions.formautofill.heuristics.enabled", false); // [FF55+]
/* 0518: disable Web Compatibility Reporter [FF56+]
* Web Compatibility Reporter adds a "Report Site Issue" button to send data to Mozilla ***/
user_pref("extensions.webcompat-reporter.enabled", false);
/*** [SECTION 0600]: BLOCK IMPLICIT OUTBOUND [not explicitly asked for - e.g. clicked on] ***/
user_pref("_user.js.parrot", "0600 syntax error: the parrot's no more!");
/* 0601: disable link prefetching
* [1] https://developer.mozilla.org/docs/Web/HTTP/Link_prefetching_FAQ ***/
user_pref("network.prefetch-next", false);
/* 0602: disable DNS prefetching
* [1] https://www.ghacks.net/2013/04/27/firefox-prefetching-what-you-need-to-know/
* [2] https://developer.mozilla.org/docs/Web/HTTP/Headers/X-DNS-Prefetch-Control ***/
user_pref("network.dns.disablePrefetch", true);
user_pref("network.dns.disablePrefetchFromHTTPS", true); // [HIDDEN PREF]
/* 0603: disable Seer/Necko
* [1] https://developer.mozilla.org/docs/Mozilla/Projects/Necko ***/
user_pref("network.predictor.enabled", false);
/* 0605: disable link-mouseover opening connection to linked server
* [1] https://news.slashdot.org/story/15/08/14/2321202/how-to-quash-firefoxs-silent-requests
* [2] https://www.ghacks.net/2015/08/16/block-firefox-from-connecting-to-sites-when-you-hover-over-links/ ***/
user_pref("network.http.speculative-parallel-limit", 0);
/* 0606: disable pings (but enforce same host in case)
* [1] http://kb.mozillazine.org/Browser.send_pings
* [2] http://kb.mozillazine.org/Browser.send_pings.require_same_host ***/
user_pref("browser.send_pings", false);
user_pref("browser.send_pings.require_same_host", true);
/* 0608: disable predictor / prefetching [FF48+] ***/
user_pref("network.predictor.enable-prefetch", false);
/*** [SECTION 0700]: HTTP* / TCP/IP / DNS / PROXY / SOCKS etc ***/
user_pref("_user.js.parrot", "0700 syntax error: the parrot's given up the ghost!");
/* 0701: disable IPv6
* IPv6 can be abused, especially regarding MAC addresses. They also do not play nice
* with VPNs. That's even assuming your ISP and/or router and/or website can handle it
* [NOTE] This is just an application level fallback. Disabling IPv6 is best done
* at an OS/network level, and/or configured properly in VPN setups
* [TEST] http://ipv6leak.com/
* [1] https://github.com/ghacksuserjs/ghacks-user.js/issues/437#issuecomment-403740626
* [2] https://www.internetsociety.org/tag/ipv6-security/ (see Myths 2,4,5,6) ***/
user_pref("network.dns.disableIPv6", true);
/* 0702: disable HTTP2 (which was based on SPDY which is now deprecated)
* HTTP2 raises concerns with "multiplexing" and "server push", does nothing to enhance
* privacy, and in fact opens up a number of server-side fingerprinting opportunities
* [SETUP-PERF] Relax this if you have FPI enabled (see 4000) *AND* you understand the
* consequences. FPI isolates these, but it was designed with the Tor protocol in mind,
* and the Tor Browser has extra protection, including enhanced sanitizing per Identity.
* [1] https://http2.github.io/faq/
* [2] https://blog.scottlogic.com/2014/11/07/http-2-a-quick-look.html
* [3] https://queue.acm.org/detail.cfm?id=2716278
* [4] https://github.com/ghacksuserjs/ghacks-user.js/issues/107 ***/
user_pref("network.http.spdy.enabled", false);
user_pref("network.http.spdy.enabled.deps", false);
user_pref("network.http.spdy.enabled.http2", false);
user_pref("network.http.spdy.websockets", false); // [FF65+]
/* 0703: disable HTTP Alternative Services [FF37+]
* [SETUP-PERF] Relax this if you have FPI enabled (see 4000) *AND* you understand the
* consequences. FPI isolates these, but it was designed with the Tor protocol in mind,
* and the Tor Browser has extra protection, including enhanced sanitizing per Identity.
* [1] https://tools.ietf.org/html/rfc7838#section-9
* [2] https://www.mnot.net/blog/2016/03/09/alt-svc ***/
user_pref("network.http.altsvc.enabled", false);
user_pref("network.http.altsvc.oe", false);
/* 0704: enforce the proxy server to do any DNS lookups when using SOCKS
* e.g. in Tor, this stops your local DNS server from knowing your Tor destination
* as a remote Tor node will handle the DNS request
* [1] http://kb.mozillazine.org/Network.proxy.socks_remote_dns
* [2] https://trac.torproject.org/projects/tor/wiki/doc/TorifyHOWTO/WebBrowsers ***/
user_pref("network.proxy.socks_remote_dns", true);
/* 0706: remove paths when sending URLs to PAC scripts [FF51+]
* CVE-2017-5384: Information disclosure via Proxy Auto-Config (PAC)
* [1] https://bugzilla.mozilla.org/1255474 ***/
user_pref("network.proxy.autoconfig_url.include_path", false); // [DEFAULT: false]
/* 0707: disable (or setup) DNS-over-HTTPS (DoH) [FF60+]
* TRR = Trusted Recursive Resolver
* .mode: 0=off, 1=race, 2=TRR first, 3=TRR only, 4=race for stats but always use native result
* [WARNING] DoH bypasses hosts and gives info to yet another party (e.g. Cloudflare)
* [1] https://www.ghacks.net/2018/04/02/configure-dns-over-https-in-firefox/
* [2] https://hacks.mozilla.org/2018/05/a-cartoon-intro-to-dns-over-https/ ***/
// user_pref("network.trr.mode", 0);
// user_pref("network.trr.bootstrapAddress", "");
// user_pref("network.trr.uri", "");
/* 0708: disable FTP [FF60+]
* [1] https://www.ghacks.net/2018/02/20/firefox-60-with-new-preference-to-disable-ftp/ ***/
// user_pref("network.ftp.enabled", false);
/* 0709: disable using UNC (Uniform Naming Convention) paths [FF61+]
* [1] https://trac.torproject.org/projects/tor/ticket/26424 ***/
user_pref("network.file.disable_unc_paths", true); // [HIDDEN PREF]
/* 0710: disable GIO as a potential proxy bypass vector
* Gvfs/GIO has a set of supported protocols like obex, network, archive, computer, dav, cdda,
* gphoto2, trash, etc. By default only smb and sftp protocols are accepted so far (as of FF64)
* [1] https://bugzilla.mozilla.org/1433507
* [2] https://trac.torproject.org/23044
* [3] https://en.wikipedia.org/wiki/GVfs
* [4] https://en.wikipedia.org/wiki/GIO_(software) ***/
user_pref("network.gio.supported-protocols", ""); // [HIDDEN PREF]
/*** [SECTION 0800]: LOCATION BAR / SEARCH BAR / SUGGESTIONS / HISTORY / FORMS [SETUP-CHROME]
Change items 0850 and above to suit for privacy vs convenience and functionality. Consider
your environment (no unwanted eyeballs), your device (restricted access), your device's
unattended state (locked, encrypted, forensic hardened). Likewise, you may want to check
the items cleared on shutdown in section 2800.
[NOTE] The urlbar is also commonly referred to as the location bar and address bar
#Required reading [#] https://xkcd.com/538/
***/
user_pref("_user.js.parrot", "0800 syntax error: the parrot's ceased to be!");
/* 0801: disable location bar using search
* don't leak typos to a search engine, give an error message instead ***/
user_pref("keyword.enabled", false);
/* 0802: disable location bar domain guessing
* domain guessing intercepts DNS "hostname not found errors" and resends a
* request (e.g. by adding www or .com). This is inconsistent use (e.g. FQDNs), does not work
* via Proxy Servers (different error), is a flawed use of DNS (TLDs: why treat .com
* as the 411 for DNS errors?), privacy issues (why connect to sites you didn't
* intend to), can leak sensitive data (e.g. query strings: e.g. Princeton attack),
* and is a security risk (e.g. common typos & malicious sites set up to exploit this) ***/
user_pref("browser.fixup.alternate.enabled", false);
/* 0803: display all parts of the url in the location bar ***/
user_pref("browser.urlbar.trimURLs", false);
/* 0804: limit history leaks via enumeration (PER TAB: back/forward)
* This is a PER TAB session history. You still have a full history stored under all history
* default=50, minimum=1=currentpage, 2 is the recommended minimum as some pages
* use it as a means of referral (e.g. hotlinking), 4 or 6 or 10 may be more practical ***/
user_pref("browser.sessionhistory.max_entries", 10);
/* 0805: disable CSS querying page history - CSS history leak
* [NOTE] This has NEVER been fully "resolved": in Mozilla/docs it is stated it's
* only in 'certain circumstances', also see latest comments in [2]
* [TEST] http://lcamtuf.coredump.cx/yahh/ (see github wiki APPENDIX C on how to use)
* [1] https://dbaron.org/mozilla/visited-privacy
* [2] https://bugzilla.mozilla.org/147777
* [3] https://developer.mozilla.org/docs/Web/CSS/Privacy_and_the_:visited_selector ***/
user_pref("layout.css.visited_links_enabled", false);
/* 0806: disable displaying javascript in history URLs ***/
user_pref("browser.urlbar.filter.javascript", true); // [DEFAULT: true]
/* 0807: disable search bar LIVE search suggestions
* [SETTING] Search>Provide search suggestions ***/
user_pref("browser.search.suggest.enabled", false);
/* 0808: disable location bar LIVE search suggestions (requires 0807 = true)
* Also disable the location bar prompt to enable/disable or learn more about it.
* [SETTING] Search>Show search suggestions in address bar results ***/
user_pref("browser.urlbar.suggest.searches", false);
user_pref("browser.urlbar.userMadeSearchSuggestionsChoice", true); // [FF41+]
/* 0809: disable location bar suggesting "preloaded" top websites [FF54+]
* [1] https://bugzilla.mozilla.org/1211726 ***/
user_pref("browser.urlbar.usepreloadedtopurls.enabled", false);
/* 0810: disable location bar making speculative connections [FF56+]
* [1] https://bugzilla.mozilla.org/1348275 ***/
user_pref("browser.urlbar.speculativeConnect.enabled", false);
/* 0850a: disable location bar suggestion types
* [SETUP-CHROME] If all three suggestion types are false, search engine keywords are disabled
* [SETTING] Privacy & Security>Address Bar>When using the address bar, suggest ***/
// user_pref("browser.urlbar.suggest.history", false);
// user_pref("browser.urlbar.suggest.bookmark", false);
// user_pref("browser.urlbar.suggest.openpage", false);
/* 0850c: disable location bar dropdown
* This value controls the total number of entries to appear in the location bar dropdown
* [NOTE] Items (bookmarks/history/openpages) with a high "frecency"/"bonus" will always
* be displayed (no we do not know how these are calculated or what the threshold is),
* and this does not affect the search by search engine suggestion (see 0808)
* [NOTE] This setting is only useful if you want to enable search engine keywords
* (i.e. at least one of 0850a suggestion types must be true) but you want to *limit* suggestions shown ***/
// user_pref("browser.urlbar.maxRichResults", 0);
/* 0850d: disable location bar autofill
* [1] http://kb.mozillazine.org/Inline_autocomplete ***/
// user_pref("browser.urlbar.autoFill", false);
/* 0850e: disable location bar one-off searches [FF51+]
* [1] https://www.ghacks.net/2016/08/09/firefox-one-off-searches-address-bar/ ***/
// user_pref("browser.urlbar.oneOffSearches", false);
/* 0860: disable search and form history
* [NOTE] You can clear formdata on exiting Firefox (see 2803)
* [SETTING] Privacy & Security>History>Custom Settings>Remember search and form history ***/
user_pref("browser.formfill.enable", false);
/* 0862: disable browsing and download history
* [NOTE] You can clear history and downloads on exiting Firefox (see 2803)
* [SETTING] Privacy & Security>History>Custom Settings>Remember browsing and download history ***/
// user_pref("places.history.enabled", false);
/* 0864: disable date/time picker
* This can leak your locale if not en-US
* [1] https://trac.torproject.org/projects/tor/ticket/21787 ***/
user_pref("dom.forms.datetime", false);
/* 0870: disable Windows jumplist [WINDOWS] ***/
user_pref("browser.taskbar.lists.enabled", false);
user_pref("browser.taskbar.lists.frequent.enabled", false);
user_pref("browser.taskbar.lists.recent.enabled", false);
user_pref("browser.taskbar.lists.tasks.enabled", false);
/* 0871: disable Windows taskbar preview [WINDOWS] ***/
user_pref("browser.taskbar.previews.enable", false);
/*** [SECTION 0900]: PASSWORDS ***/
user_pref("_user.js.parrot", "0900 syntax error: the parrot's expired!");
/* 0901: disable saving passwords
* [NOTE] This does not clear any passwords already saved
* [SETTING] Privacy & Security>Forms & Passwords>Ask to save logins and passwords for websites ***/
// user_pref("signon.rememberSignons", false);
/* 0902: use a master password (recommended if you save passwords)
* There are no preferences for this. It is all handled internally.
* [SETTING] Privacy & Security>Forms & Passwords>Use a master password
* [1] https://support.mozilla.org/kb/use-master-password-protect-stored-logins ***/
/* 0903: set how often Firefox should ask for the master password
* 0=the first time (default), 1=every time it's needed, 2=every n minutes (see 0904) ***/
user_pref("security.ask_for_password", 2);
/* 0904: set how often in minutes Firefox should ask for the master password (see 0903)
* in minutes, default is 30 ***/
user_pref("security.password_lifetime", 5);
/* 0905: disable auto-filling username & password form fields
* can leak in cross-site forms AND be spoofed
* [NOTE] Password will still be auto-filled after a user name is manually entered
* [1] http://kb.mozillazine.org/Signon.autofillForms ***/
user_pref("signon.autofillForms", false);
/* 0906: disable websites' autocomplete="off" [FF30+]
* Don't let sites dictate use of saved logins and passwords. Increase security through
* stronger password use. The trade-off is the convenience. Some sites should never be
* saved (such as banking sites). Set at true, informed users can make their own choice. ***/
user_pref("signon.storeWhenAutocompleteOff", true); // [DEFAULT: true]
/* 0907: display warnings for logins on non-secure (non HTTPS) pages
* [1] https://bugzilla.mozilla.org/1217156 ***/
user_pref("security.insecure_password.ui.enabled", true);
/* 0909: disable formless login capture for Password Manager [FF51+] ***/
user_pref("signon.formlessCapture.enabled", false);
/* 0910: disable autofilling saved passwords on HTTP pages and show warning [FF52+]
* [1] https://www.fxsitecompat.com/en-CA/docs/2017/insecure-login-forms-now-disable-autofill-show-warning-beneath-input-control/
* [2] https://bugzilla.mozilla.org/buglist.cgi?bug_id=1217152,1319119 ***/
user_pref("signon.autofillForms.http", false);
user_pref("security.insecure_field_warning.contextual.enabled", true);
/* 0912: limit (or disable) HTTP authentication credentials dialogs triggered by sub-resources [FF41+]
* hardens against potential credentials phishing
* 0=don't allow sub-resources to open HTTP authentication credentials dialogs
* 1=don't allow cross-origin sub-resources to open HTTP authentication credentials dialogs
* 2=allow sub-resources to open HTTP authentication credentials dialogs (default)
* [1] https://www.fxsitecompat.com/en-CA/docs/2015/http-auth-dialog-can-no-longer-be-triggered-by-cross-origin-resources/ ***/
user_pref("network.auth.subresource-http-auth-allow", 1);
/*** [SECTION 1000]: CACHE / SESSION (RE)STORE / FAVICONS [SETUP-CHROME]
ETAG [1] and other [2][3] cache tracking/fingerprinting techniques can be averted by
disabling *BOTH* disk (1001) and memory (1003) cache. ETAGs can also be neutralized
by modifying response headers [4]. Another solution is to use a hardened configuration
with Temporary Containers [5]. Alternatively, you can *LIMIT* exposure by clearing
cache on close (2803). or on a regular basis manually or with an extension.
[1] https://en.wikipedia.org/wiki/HTTP_ETag#Tracking_using_ETags
[2] https://robertheaton.com/2014/01/20/cookieless-user-tracking-for-douchebags/
[3] https://www.grepular.com/Preventing_Web_Tracking_via_the_Browser_Cache
[4] https://github.com/ghacksuserjs/ghacks-user.js/wiki/4.2.4-Header-Editor
[5] https://medium.com/@stoically/enhance-your-privacy-in-firefox-with-temporary-containers-33925cd6cd21
***/
user_pref("_user.js.parrot", "1000 syntax error: the parrot's gone to meet 'is maker!");
/** CACHE ***/
/* 1001: disable disk cache ***/
user_pref("browser.cache.disk.enable", false);
user_pref("browser.cache.disk.capacity", 0);
user_pref("browser.cache.disk.smart_size.enabled", false);
user_pref("browser.cache.disk.smart_size.first_run", false);
/* 1002: disable disk cache for SSL pages
* [1] http://kb.mozillazine.org/Browser.cache.disk_cache_ssl ***/
user_pref("browser.cache.disk_cache_ssl", false);
/* 1003: disable memory cache
* [NOTE] Not recommended due to performance issues ***/
// user_pref("browser.cache.memory.enable", false);
// user_pref("browser.cache.memory.capacity", 0); // [HIDDEN PREF]
/* 1005: disable fastback cache
* To improve performance when pressing back/forward Firefox stores visited pages
* so they don't have to be re-parsed. This is not the same as memory cache.
* 0=none, -1=auto (that's minus 1), or for other values see [1]
* [WARNING] Not recommended unless you know what you're doing
* [1] http://kb.mozillazine.org/Browser.sessionhistory.max_total_viewers ***/
// user_pref("browser.sessionhistory.max_total_viewers", 0);
/* 1006: disable permissions manager from writing to disk [RESTART]
* [NOTE] This means any permission changes are session only
* [1] https://bugzilla.mozilla.org/967812 ***/
// user_pref("permissions.memory_only", true); // [HIDDEN PREF]
/* 1008: set DNS cache and expiration time (default 400 and 60, same as Tor Browser) ***/
// user_pref("network.dnsCacheEntries", 400);
// user_pref("network.dnsCacheExpiration", 60);
/** SESSIONS & SESSION RESTORE ***/
/* 1020: exclude "Undo Closed Tabs" in Session Restore ***/
// user_pref("browser.sessionstore.max_tabs_undo", 0);
/* 1021: disable storing extra session data [SETUP-CHROME]
* extra session data contains contents of forms, scrollbar positions, cookies and POST data
* define on which sites to save extra session data:
* 0=everywhere, 1=unencrypted sites, 2=nowhere ***/
user_pref("browser.sessionstore.privacy_level", 2);
/* 1022: disable resuming session from crash ***/
// user_pref("browser.sessionstore.resume_from_crash", false);
/* 1023: set the minimum interval between session save operations
* Increasing this can help on older machines and some websites, as well as reducing writes, see [1]
* Default is 15000 (15 secs). Try 30000 (30 secs), 60000 (1 min) etc
* [SETUP-CHROME] This can also affect entries in the "Recently Closed Tabs" feature:
* i.e. the longer the interval the more chance a quick tab open/close won't be captured.
* This longer interval *may* affect history but we cannot replicate any history not recorded
* [1] https://bugzilla.mozilla.org/1304389 ***/
user_pref("browser.sessionstore.interval", 30000);
/* 1024: disable automatic Firefox start and session restore after reboot [FF62+] [WINDOWS]
* [1] https://bugzilla.mozilla.org/603903 ***/
user_pref("toolkit.winRegisterApplicationRestart", false);
/** FAVICONS ***/
/* 1030: disable favicons in shortcuts
* URL shortcuts use a cached randomly named .ico file which is stored in your
* profile/shortcutCache directory. The .ico remains after the shortcut is deleted.
* If set to false then the shortcuts use a generic Firefox icon ***/
user_pref("browser.shell.shortcutFavicons", false);
/* 1031: disable favicons in tabs and new bookmarks
* bookmark favicons are stored as data blobs in favicons.sqlite ***/
// user_pref("browser.chrome.site_icons", false);
/* 1032: disable favicons in web notifications ***/
user_pref("alerts.showFavicons", false); // [DEFAULT: false]
/*** [SECTION 1200]: HTTPS (SSL/TLS / OCSP / CERTS / HPKP / CIPHERS)
Note that your cipher and other settings can be used server side as a fingerprint attack
vector, see [1] (It's quite technical but the first part is easy to understand
and you can stop reading when you reach the second section titled "Enter Bro")
Option 1: Use defaults for ciphers (1260's). There is nothing *weak* about these, but
due to breakage, browsers can't deprecate them until the web stops using them
Option 2: Disable the ciphers in 1261, 1262 and 1263. These shouldn't break anything.
Optionally, disable the ciphers in 1264.
[1] https://www.securityartwork.es/2017/02/02/tls-client-fingerprinting-with-bro/
***/
user_pref("_user.js.parrot", "1200 syntax error: the parrot's a stiff!");
/** SSL (Secure Sockets Layer) / TLS (Transport Layer Security) ***/
/* 1201: disable old SSL/TLS "insecure" renegotiation (vulnerable to a MiTM attack)
* [SETUP-WEB] <2% of secure sites do NOT support the newer "secure" renegotiation, see [2]
* [1] https://wiki.mozilla.org/Security:Renegotiation
* [2] https://www.ssllabs.com/ssl-pulse/ ***/
user_pref("security.ssl.require_safe_negotiation", true);
/* 1202: control TLS versions with min and max
* 1=TLS 1.0, 2=TLS 1.1, 3=TLS 1.2, 4=TLS 1.3
* [NOTE] Jul-2017: Telemetry indicates approx 2% of TLS web traffic uses 1.0 or 1.1
* [1] http://kb.mozillazine.org/Security.tls.version.*
* [2] https://www.ssl.com/how-to/turn-off-ssl-3-0-and-tls-1-0-in-your-browser/
* [2] archived: https://archive.is/hY2Mm ***/
// user_pref("security.tls.version.min", 3);
user_pref("security.tls.version.max", 4);
/* 1203: disable SSL session tracking [FF36+]
* SSL Session IDs are unique, last up to 24hrs in Firefox, and can be used for tracking
* [SETUP-PERF] Relax this if you have FPI enabled (see 4000) *AND* you understand the
* consequences. FPI isolates these, but it was designed with the Tor protocol in mind,
* and the Tor Browser has extra protection, including enhanced sanitizing per Identity.
* [1] https://tools.ietf.org/html/rfc5077
* [2] https://bugzilla.mozilla.org/967977
* [3] https://arxiv.org/abs/1810.07304 ***/
user_pref("security.ssl.disable_session_identifiers", true); // [HIDDEN PREF]
/* 1204: disable SSL Error Reporting
* [1] https://firefox-source-docs.mozilla.org/browser/base/sslerrorreport/preferences.html ***/
user_pref("security.ssl.errorReporting.automatic", false);
user_pref("security.ssl.errorReporting.enabled", false);
user_pref("security.ssl.errorReporting.url", "");
/* 1205: disable TLS1.3 0-RTT (round-trip time) [FF51+]
* [1] https://github.com/tlswg/tls13-spec/issues/1001
* [2] https://blog.cloudflare.com/tls-1-3-overview-and-q-and-a/ ***/
user_pref("security.tls.enable_0rtt_data", false);
/** OCSP (Online Certificate Status Protocol)
#Required reading [#] https://scotthelme.co.uk/revocation-is-broken/ ***/
/* 1210: enable OCSP Stapling
* [1] https://blog.mozilla.org/security/2013/07/29/ocsp-stapling-in-firefox/ ***/
user_pref("security.ssl.enable_ocsp_stapling", true);
/* 1211: control when to use OCSP fetching (to confirm current validity of certificates)
* 0=disabled, 1=enabled (default), 2=enabled for EV certificates only
* OCSP (non-stapled) leaks information about the sites you visit to the CA (cert authority)
* It's a trade-off between security (checking) and privacy (leaking info to the CA)
* [NOTE] This pref only controls OCSP fetching and does not affect OCSP stapling
* [1] https://en.wikipedia.org/wiki/Ocsp ***/
user_pref("security.OCSP.enabled", 1);
/* 1212: set OCSP fetch failures (non-stapled, see 1211) to hard-fail [SETUP-WEB]
* When a CA cannot be reached to validate a cert, Firefox just continues the connection (=soft-fail)
* Setting this pref to true tells Firefox to instead terminate the connection (=hard-fail)
* It is pointless to soft-fail when an OCSP fetch fails: you cannot confirm a cert is still valid (it
* could have been revoked) and/or you could be under attack (e.g. malicious blocking of OCSP servers)
* [1] https://blog.mozilla.org/security/2013/07/29/ocsp-stapling-in-firefox/
* [2] https://www.imperialviolet.org/2014/04/19/revchecking.html ***/
user_pref("security.OCSP.require", true);
/** CERTS / HPKP (HTTP Public Key Pinning) ***/
/* 1220: disable or limit SHA-1 certificates
* 0=all SHA1 certs are allowed
* 1=all SHA1 certs are blocked
* 2=deprecated option that now maps to 1
* 3=only allowed for locally-added roots (e.g. anti-virus)
* 4=only allowed for locally-added roots or for certs in 2015 and earlier
* [SETUP-CHROME] When disabled, some man-in-the-middle devices (e.g. security scanners and
* antivirus products, may fail to connect to HTTPS sites. SHA-1 is *almost* obsolete.
* [1] https://blog.mozilla.org/security/2016/10/18/phasing-out-sha-1-on-the-public-web/ ***/
user_pref("security.pki.sha1_enforcement_level", 1);
/* 1221: disable Windows 8.1's Microsoft Family Safety cert [FF50+] [WINDOWS]
* 0=disable detecting Family Safety mode and importing the root
* 1=only attempt to detect Family Safety mode (don't import the root)
* 2=detect Family Safety mode and import the root
* [1] https://trac.torproject.org/projects/tor/ticket/21686 ***/
user_pref("security.family_safety.mode", 0);
/* 1222: disable intermediate certificate caching (fingerprinting attack vector) [RESTART]
* [NOTE] This affects login/cert/key dbs. The effect is all credentials are session-only.
* Saved logins and passwords are not available. Reset the pref and restart to return them.
* [TEST] https://fiprinca.0x90.eu/poc/
* [1] https://bugzilla.mozilla.org/1334485 - related bug
* [2] https://bugzilla.mozilla.org/1216882 - related bug (see comment 9) ***/
// user_pref("security.nocertdb", true); // [HIDDEN PREF]
/* 1223: enforce strict pinning
* PKP (Public Key Pinning) 0=disabled 1=allow user MiTM (such as your antivirus), 2=strict
* [WARNING] If you rely on an AV (antivirus) to protect your web browsing
* by inspecting ALL your web traffic, then leave at current default=1
* [1] https://trac.torproject.org/projects/tor/ticket/16206 ***/
user_pref("security.cert_pinning.enforcement_level", 2);
/** MIXED CONTENT ***/
/* 1240: disable insecure active content on https pages
* [1] https://trac.torproject.org/projects/tor/ticket/21323 ***/
user_pref("security.mixed_content.block_active_content", true); // [DEFAULT: true]
/* 1241: disable insecure passive content (such as images) on https pages ***/
user_pref("security.mixed_content.block_display_content", true);
/* 1243: block unencrypted requests from Flash on encrypted pages to mitigate MitM attacks [FF59+]
* [1] https://bugzilla.mozilla.org/1190623 ***/
user_pref("security.mixed_content.block_object_subrequest", true);
/** CIPHERS [see the section 1200 intro] ***/
/* 1261: disable 3DES (effective key size < 128)
* [1] https://en.wikipedia.org/wiki/3des#Security
* [2] http://en.citizendium.org/wiki/Meet-in-the-middle_attack
* [3] https://www-archive.mozilla.org/projects/security/pki/nss/ssl/fips-ssl-ciphersuites.html ***/
// user_pref("security.ssl3.rsa_des_ede3_sha", false);
/* 1262: disable 128 bits ***/
// user_pref("security.ssl3.ecdhe_ecdsa_aes_128_sha", false);
// user_pref("security.ssl3.ecdhe_rsa_aes_128_sha", false);
/* 1263: disable DHE (Diffie-Hellman Key Exchange)
* [1] https://www.eff.org/deeplinks/2015/10/how-to-protect-yourself-from-nsa-attacks-1024-bit-DH ***/
// user_pref("security.ssl3.dhe_rsa_aes_128_sha", false);
// user_pref("security.ssl3.dhe_rsa_aes_256_sha", false);
/* 1264: disable the remaining non-modern cipher suites as of FF52 ***/
// user_pref("security.ssl3.rsa_aes_128_sha", false);
// user_pref("security.ssl3.rsa_aes_256_sha", false);
/** UI (User Interface) ***/
/* 1270: display warning (red padlock) for "broken security" (see 1201)
* [1] https://wiki.mozilla.org/Security:Renegotiation ***/
user_pref("security.ssl.treat_unsafe_negotiation_as_broken", true);
/* 1271: control "Add Security Exception" dialog on SSL warnings
* 0=do neither 1=pre-populate url 2=pre-populate url + pre-fetch cert (default)
* [1] https://github.com/pyllyukko/user.js/issues/210 ***/
user_pref("browser.ssl_override_behavior", 1);
/* 1272: display advanced information on Insecure Connection warning pages
* only works when it's possible to add an exception
* i.e. it doesn't work for HSTS discrepancies (https://subdomain.preloaded-hsts.badssl.com/)
* [TEST] https://expired.badssl.com/ ***/
user_pref("browser.xul.error_pages.expert_bad_cert", true);
/* 1273: display "insecure" icon and "Not Secure" text on HTTP sites ***/
user_pref("security.insecure_connection_icon.enabled", true); // [FF59+]
user_pref("security.insecure_connection_text.enabled", true); // [FF60+]
// user_pref("security.insecure_connection_icon.pbmode.enabled", true); // [FF59+] private windows only
// user_pref("security.insecure_connection_text.pbmode.enabled", true); // [FF60+] private windows only
/*** [SECTION 1400]: FONTS ***/
user_pref("_user.js.parrot", "1400 syntax error: the parrot's bereft of life!");
/* 1401: disable websites choosing fonts (0=block, 1=allow)
* If you disallow fonts, this drastically limits/reduces font
* enumeration (by JS) which is a high entropy fingerprinting vector.
* [NOTE] Disabling fonts can uglify the web a fair bit.
* [SETTING] General>Language and Appearance>Fonts & Colors>Advanced>Allow pages to choose... ***/
user_pref("browser.display.use_document_fonts", 0);
/* 1402: set more legible default fonts
* [NOTE] Example below for Windows/Western only
* [SETTING] General>Language and Appearance>Fonts & Colors>Advanced>Serif|Sans-serif|Monospace ***/
// user_pref("font.name.serif.x-unicode", "Georgia");
// user_pref("font.name.serif.x-western", "Georgia"); // default: Times New Roman
// user_pref("font.name.sans-serif.x-unicode", "Arial");
// user_pref("font.name.sans-serif.x-western", "Arial"); // default: Arial
// user_pref("font.name.monospace.x-unicode", "Lucida Console");
// user_pref("font.name.monospace.x-western", "Lucida Console"); // default: Courier New
/* 1403: disable icon fonts (glyphs) and local fallback rendering
* [1] https://bugzilla.mozilla.org/789788
* [2] https://trac.torproject.org/projects/tor/ticket/8455 ***/
// user_pref("gfx.downloadable_fonts.enabled", false); // [FF41+]
// user_pref("gfx.downloadable_fonts.fallback_delay", -1);
/* 1404: disable rendering of SVG OpenType fonts
* [1] https://wiki.mozilla.org/SVGOpenTypeFonts - iSECPartnersReport recommends to disable this ***/
user_pref("gfx.font_rendering.opentype_svg.enabled", false);
/* 1405: disable WOFF2 (Web Open Font Format) [FF35+] ***/
user_pref("gfx.downloadable_fonts.woff2.enabled", false);
/* 1406: disable CSS Font Loading API
* [NOTE] Disabling fonts can uglify the web a fair bit. ***/
user_pref("layout.css.font-loading-api.enabled", false);
/* 1407: disable special underline handling for a few fonts which you will probably never use [RESTART]
* Any of these fonts on your system can be enumerated for fingerprinting.
* [1] http://kb.mozillazine.org/Font.blacklist.underline_offset ***/
user_pref("font.blacklist.underline_offset", "");
/* 1408: disable graphite which FF49 turned back on by default
* In the past it had security issues. Update: This continues to be the case, see [1]
* [1] https://www.mozilla.org/security/advisories/mfsa2017-15/#CVE-2017-7778 ***/
user_pref("gfx.font_rendering.graphite.enabled", false);
/* 1409: limit system font exposure to a whitelist [FF52+] [RESTART]
* If the whitelist is empty, then whitelisting is considered disabled and all fonts are allowed.
* [WARNING] Creating your own probably highly-unique whitelist will raise your entropy.
* Eventually privacy.resistFingerprinting (see 4500) will cover this (and 1401 can be relaxed)
* [1] https://bugzilla.mozilla.org/1121643 ***/
// user_pref("font.system.whitelist", ""); // [HIDDEN PREF]
/*** [SECTION 1600]: HEADERS / REFERERS
Only *cross domain* referers need controlling and XOriginPolicy (1603) is perfect for that. Thus we enforce
the default values for 1601, 1602, 1605 and 1606 to minimize breakage, and only tweak 1603 and 1604.
Our default settings provide the best balance between protection and amount of breakage.
To harden it a bit more you can set XOriginPolicy (1603) to 2 (+ optionally 1604 to 1 or 2).
To fix broken sites (including your modem/router), temporarily set XOriginPolicy=0 and XOriginTrimmingPolicy=2 in about:config,
use the site and then change the values back. If you visit those sites regularly (e.g. vimeo), use an extension.
full URI: https://example.com:8888/foo/bar.html?id=1234
scheme+host+port+path: https://example.com:8888/foo/bar.html
scheme+host+port: https://example.com:8888
#Required reading [#] https://feeding.cloud.geek.nz/posts/tweaking-referrer-for-privacy-in-firefox/
***/
user_pref("_user.js.parrot", "1600 syntax error: the parrot rests in peace!");
/* 1601: ALL: control when images/links send a referer
* 0=never, 1=send only when links are clicked, 2=for links and images (default) ***/
user_pref("network.http.sendRefererHeader", 2);
/* 1602: ALL: control the amount of information to send
* 0=send full URI (default), 1=scheme+host+port+path, 2=scheme+host+port ***/
user_pref("network.http.referer.trimmingPolicy", 0);
/* 1603: CROSS ORIGIN: control when to send a referer [SETUP-WEB]
* 0=always (default), 1=only if base domains match, 2=only if hosts match ***/
user_pref("network.http.referer.XOriginPolicy", 1);
/* 1604: CROSS ORIGIN: control the amount of information to send [FF52+]
* 0=send full URI (default), 1=scheme+host+port+path, 2=scheme+host+port ***/
user_pref("network.http.referer.XOriginTrimmingPolicy", 0);
/* 1605: ALL: disable spoofing a referer
* [WARNING] Do not set this to true, as spoofing effectively disables the anti-CSRF
* (Cross-Site Request Forgery) protections that some sites may rely on ***/
user_pref("network.http.referer.spoofSource", false); // [DEFAULT: false]
/* 1606: ALL: set the default Referrer Policy [FF59+]
* 0=no-referer, 1=same-origin, 2=strict-origin-when-cross-origin, 3=no-referrer-when-downgrade
* [NOTE] This is only a default, it can be overridden by a site-controlled Referrer Policy
* [1] https://www.w3.org/TR/referrer-policy/
* [2] https://developer.mozilla.org/docs/Web/HTTP/Headers/Referrer-Policy
* [3] https://blog.mozilla.org/security/2018/01/31/preventing-data-leaks-by-stripping-path-information-in-http-referrers/ ***/
user_pref("network.http.referer.defaultPolicy", 3); // [DEFAULT: 3]
user_pref("network.http.referer.defaultPolicy.pbmode", 2); // [DEFAULT: 2]
/* 1607: TOR: hide (not spoof) referrer when leaving a .onion domain [FF54+]
* [NOTE] Firefox cannot access .onion sites by default. We recommend you use
* the Tor Browser which is specifically designed for hidden services
* [1] https://bugzilla.mozilla.org/1305144 ***/
user_pref("network.http.referer.hideOnionSource", true);
/* 1610: ALL: enable the DNT (Do Not Track) HTTP header
* [NOTE] DNT is enforced with TP (see 0420) regardless of this pref
* [SETTING] Privacy & Security>Content Blocking>Send websites a "Do Not Track"... ***/
user_pref("privacy.donottrackheader.enabled", true);
/*** [SECTION 1700]: CONTAINERS
If you want to *really* leverage containers, we highly recommend Temporary Containers [2].
Read the article by the extension author [3], and check out the github wiki/repo [4].
[1] https://wiki.mozilla.org/Security/Contextual_Identity_Project/Containers
[2] https://addons.mozilla.org/firefox/addon/temporary-containers/
[3] https://medium.com/@stoically/enhance-your-privacy-in-firefox-with-temporary-containers-33925cd6cd21
[4] https://github.com/stoically/temporary-containers/wiki
***/
user_pref("_user.js.parrot", "1700 syntax error: the parrot's bit the dust!");
/* 1701: enable Container Tabs setting in preferences (see 1702) [FF50+]
* [1] https://bugzilla.mozilla.org/1279029 ***/
user_pref("privacy.userContext.ui.enabled", true);
/* 1702: enable Container Tabs [FF50+]
* [SETTING] General>Tabs>Enable Container Tabs ***/
user_pref("privacy.userContext.enabled", true);
/* 1703: enable a private container for thumbnail loads [FF51+] ***/
user_pref("privacy.usercontext.about_newtab_segregation.enabled", true); // [DEFAULT: true in FF61+]
/* 1704: set behaviour on "+ Tab" button to display container menu [FF53+] [SETUP-CHROME]
* 0=no menu (default), 1=show when clicked, 2=show on long press
* [NOTE] The menu does not contain a non-container tab option (use Ctrl+T to open non-container tab)