http.headers.Referrer-Policy - Update for "Safari on iOS", Safari and IE

[debiru]

What information was incorrect, unhelpful, or incomplete?

• It is written as No (No support) for iOS Safari and IE in the MDN. But current iOS Safari supports it as well as Safari.
  https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Referrer-Policy
• And IE11 partially supports it.
• NOTES: about Default policy is strict-origin-when-cross-origin
  • At least Safari 15.3 supports this. (I have not been able to test with version 15.0)
    • Safari 14.1.2 does not support this.
  • iOS Safari (iOS 15.0) supports this.
    • iOS Safari (iOS 14.0) does not support this.

refs. https://caniuse.com/referrer-policy

What did you expect to see?

(The table before revision)	IE	Safari	Safari on iOS
Referrer-Policy	No	11.1	No
Default policy is strict-origin-when-cross-origin	No	No	No
same-origin	No	11.1	No
strict-origin	No	11.1	No
strict-origin-when-cross-origin	No	11.1	No

(The table after revision)	IE	Safari	Safari on iOS
Referrer-Policy	11 (partial support)	11.1	12
Default policy is strict-origin-when-cross-origin	No	15	15
same-origin	No	11.1	12
strict-origin	No	11.1	12
strict-origin-when-cross-origin	No	11.1	12

I'm not sure, but I made the following difference for reference.

diff --git a/http/headers/referrer-policy.json b/http/headers/referrer-policy.json
index 20ea3093f..bb5de2cc5 100644
--- a/http/headers/referrer-policy.json
+++ b/http/headers/referrer-policy.json
@@ -22,7 +22,9 @@
               "version_added": "50"
             },
             "ie": {
-              "version_added": false
+              "version_added": "11",
+              "partial_implementation": true,
+              "notes": "Browsers initially supported an <a href='https://wiki.whatwg.org/wiki/Meta_referrer'>early draft</a> of the specification which can only use a meta tag and is only compatible with the <code>origin</code> value from the new spec."
             },
             "opera": {
               "version_added": "43"
@@ -34,7 +36,7 @@
               "version_added": "11.1"
             },
             "safari_ios": {
-              "version_added": false
+              "version_added": "12"
             },
             "samsunginternet_android": {
               "version_added": "7.2"
@@ -78,10 +80,10 @@
                 "version_added": "60"
               },
               "safari": {
-                "version_added": false
+                "version_added": "15"
               },
               "safari_ios": {
-                "version_added": false
+                "version_added": "15"
               },
               "samsunginternet_android": {
                 "version_added": "14.0"
@@ -129,7 +131,7 @@
                 "version_added": "11.1"
               },
               "safari_ios": {
-                "version_added": false
+                "version_added": "12"
               },
               "samsunginternet_android": {
                 "version_added": "7.2"
@@ -177,7 +179,7 @@
                 "version_added": "11.1"
               },
               "safari_ios": {
-                "version_added": false
+                "version_added": "12"
               },
               "samsunginternet_android": {
                 "version_added": "7.2"
@@ -225,7 +227,7 @@
                 "version_added": "11.1"
               },
               "safari_ios": {
-                "version_added": false
+                "version_added": "12"
               },
               "samsunginternet_android": {
                 "version_added": "7.2"

Did you test this? If so, how?

I built a test site for Referrer Policy and tested it on each browser. Especially, I tested about support of Default policy is strict-origin-when-cross-origin.

Browser	Default policy	testing environment
Safari 14.1.2	no-referrer-when-downgrade	Native macOS
Safari 15.0	unknown (no test)	nothing
Safari 15.3	strict-origin-when-cross-origin	Native macOS
Safari on iOS 14.0	no-referrer-when-downgrade	BrowserStack
Safari on iOS 15.0	strict-origin-when-cross-origin	BrowserStack

MDN page report details

• Query: http.headers.Referrer-Policy
• MDN URL: https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Referrer-Policy
• Report started: 2022-01-26T07:55:16.261Z

[debiru]

Oops, I overlooked #9846. Sorry.