Bug 1693861: Record telemetry for popular but unsupported privacy prefs r=chutten

Differential Revision: https://phabricator.services.mozilla.com/D105823

toolkit/components/telemetry/app/TelemetryEnvironment.jsm

@@ -316,6 +316,8 @@ const DEFAULT_ENVIRONMENT_PREFS = new Map([
   ["places.history.enabled", { what: RECORD_PREF_VALUE }],
   ["plugins.show_infobar", { what: RECORD_PREF_VALUE }],
   ["privacy.fuzzyfox.enabled", { what: RECORD_PREF_VALUE }],
+  ["privacy.firstparty.isolate", { what: RECORD_PREF_VALUE }],
+  ["privacy.resistFingerprinting", { what: RECORD_PREF_VALUE }],
   ["privacy.trackingprotection.enabled", { what: RECORD_PREF_VALUE }],
   ["privacy.donottrackheader.enabled", { what: RECORD_PREF_VALUE }],
   ["security.enterprise_roots.auto-enabled", { what: RECORD_PREF_VALUE }],

toolkit/components/telemetry/docs/data/environment.rst

@@ -399,6 +399,10 @@ The following is a partial list of `collected preferences <https://searchfox.org
 
 - ``security.tls.version.enable-deprecated``: True if deprecated versions of TLS (1.0 and 1.1) have been enabled by the user. Defaults to false.
 
+- ``privacy.firstparty.isolate``: True if the user has changed the (unsupported, hidden) First Party Isolation preference. Defaults to false.
+
+- ``privacy.resistFingerprinting``: True if the user has changed the (unsupported, hidden) Resist Fingerprinting preference. Defaults to false.
+
 - ``toolkit.telemetry.pioneerId``: The state of the Pioneer ID. If set, then user is enrolled in Pioneer. Note that this does *not* collect the value.
 
 - ``app.normandy.test-prefs.bool``: Test pref that will help troubleshoot uneven unenrollment in experiments. Defaults to false.