Looks like it's probably this bug, which (to my reading) was a problem handling domain cookies: https://bugzilla.mozilla.org/show_bug.cgi?id=950399 https://bug

Looks like it's probably this bug, which (to my reading) was a problem handling domain cookies: https://bugzilla.mozilla.org/show_bug.cgi?id=950399 https://bugzilla.mozilla.org/show_bug.cgi?id=950399 This would of course affect any site, but the two common instances were FB and google.