set cookieConfig to <= 4, when enabling firstPartyIsolation

mozfreddyb / webext-firstpartyisolation

Enable First Party Isolation Pref

Mozilla Public License 2.0

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set cookieConfig to <= 4, when enabling firstPartyIsolation #27

Open mozfreddyb opened 4 years ago

mozfreddyb commented 4 years ago

Looks like dFPI might set cookieConfig to 5 and make us unable to re-enable FPI once it has been disabled. I suppose we'll either need to store the current cookieConfig value when disabling or assume it as 4 (highest protection).

See https://bugzilla.mozilla.org/show_bug.cgi?id=1649876 for more.