I don't know how many incidents like this is needed before people realized Mozilla is not the angel it used to be.
Don't forget the "bug" where Google's supercookie was un-deletable https://bugzilla.mozilla.org/show_bug.cgi?id=1008706
2) The indicated cookie (from bug 1026538) is a cookie sandboxed for privacy reasons and NOT your real Google cookie. It broke the cookie manager exactly because it was sandboxed.
So tell me, what do you mean by using quotes around "bug"?