Remove Squarespace newsletter tracker

[fmarier]

Here's a an example of a link from a Squarespace newsletter:

https://kristenyarker.com/kristen-yarker-dietitian-blog/2022/6/15/chocolate-banana-ice-pops?ss_source=sscampaigns&ss_campaign_id=6305392a3d8976566686c28f&ss_email_id=6307bc4b0140600a14744bc1&ss_campaign_name=Meal+prep+hacks%2C+is+hiding+veggies+OK%2C+new+healthy+homemade+popsicles&ss_campaign_sent_date=2022-08-25T18%3A16%3A00Z

Based on the name, ss_email_id, it seems very likely that this tracks clicks from a specific email subscriber.

The unsubscribe link doesn't use that parameter either: https://campaign-preferences.com/unsubscribe/kGuWLaa4X9G8tzigwnD...7kG-mR..Nmd_eVNJW-TUdrVUrwvY-...men5TGkFszr6FEeI8-...LskvlwyqqthfOXA-S3V...8M

[stephendonner]

Verified PASSED using

Brave	1.45.21 Chromium: 105.0.5195.68 (Official Build) nightly (x86_64)
Revision	ad13e82529051bac6a0e65f455e6d7a1e5fd7938-refs/branch-heads/5195@{#903}
OS	macOS Version 13.0 (Build 22A5331f)

Steps:

1. installed 1.45.21
2. launched Brave
3. opened Developer Tools -> Network panel from the main menu
4. loaded https://brave.com/?ss_email_id=1234
5. confirmed that the query-string parameters were dropped from the final (actually loaded) URL: https://brave.com