Earlier quoted context omitted.
You can adjust what events trigger an email at https://bugzilla.mozilla.org/userprefs.cgi?tab=email
Leaving the cynicism and hyperbole aside, what bothers me are not the e-mails, but the double-sided stance of Firefox as a project, in feature-parity bugs we get the draconian speech of "oh no, we must follow the standards strictly, it doesn't matter if every other browser work fine and it doesn't matter if you already spent your time to develop a patch", but in the outside world we get the announcement of support fo…
As far as web compatibility and standards, the inconsistency is part of Mozilla. Is Firefox a tool for open web standards advocacy? Some in Mozilla feel that way. Do we just want Firefox to render things well? There's a whole team for that too (https://wiki.mozilla.org/Compatibility). And of course there's Bugzilla, which can feel like a lottery – it's very hard to know who you encounter when you enter the project through there.
This stuff is hard, and making the right choices is hard – I'm sure Mozilla has not always made the right decisions, but I personally prefer ongoing struggles to make the right decision over a consistent and credible stance.