add last bits about ETP Strict/dFPI, closes #1337

user.js

@@ -1,7 +1,7 @@
 /******
 * name: arkenfox user.js
-* date: 9 December 2021
-* version 96-alpha
+* date: 21 January 2021
+* version 96
 * url: https://github.com/arkenfox/user.js
 * license: MIT: https://github.com/arkenfox/user.js/blob/master/LICENSE.txt
 
@@ -757,11 +757,18 @@ user_pref("extensions.postDownloadThirdPartyPrompt", false);
 /*** [SECTION 2700]: ETP (ENHANCED TRACKING PROTECTION) ***/
 user_pref("_user.js.parrot", "2700 syntax error: the parrot's joined the bleedin' choir invisible!");
 /* 2701: enable ETP Strict Mode [FF86+]
- * [NOTE] ETP Strict Mode enables Total Cookie Protection (TCP)
+ * ETP Strict Mode enables Total Cookie Protection (TCP)
+ * [NOTE] Adding site exceptions disables all ETP protections for that site and increases the risk of
+ * cross-site state tracking e.g. exceptions for SiteA and SiteB means PartyC on both sites is shared
  * [1] https://blog.mozilla.org/security/2021/02/23/total-cookie-protection/
  * [SETTING] to add site exceptions: Urlbar>ETP Shield
  * [SETTING] to manage site exceptions: Options>Privacy & Security>Enhanced Tracking Protection>Manage Exceptions ***/
 user_pref("browser.contentblocking.category", "strict");
+/* 2702: disable ETP web compat features [FF93+]
+ * [SETUP-HARDEN] Includes skip lists, heuristics (SmartBlock) and automatic grants
+ * [1] https://blog.mozilla.org/security/2021/07/13/smartblock-v2/
+ * [2] https://hg.mozilla.org/mozilla-central/rev/e5483fd469ab#l4.12 ***/
+   // user_pref("privacy.antitracking.enableWebcompat", false);
 /* 2710: enable state partitioning of service workers [FF96+] ***/
 user_pref("privacy.partition.serviceWorkers", true);