Instead of Mozilla just fucking DISABLING it, how about adding a huge blinky warning to it?
"Oh, wow. I should upgrade as soon as I get the opportunity." vs "Fuck, it broke!"
That is almost exactly what we did. You get a warning with the option to ignore it and continuing like nothing happened.
I'm only pointing out that the methodology you're using in that specific comparison is flawed. I'm not even saying you're wrong (I don't know if you are).
I'm not making up excuses, I'm actually trying to help you come up with more compelling arguments.
You can spare us the list/rant. I know I've read it many times before.
Crashes per 100 active daily users, version 10.0, the version before the most recent:
Version 11 is less stable. Crashes per 100 active daily users, version 11.0, the most recent version:
Comparing crashes this way isn't quite fair. Firefox interacts with other software (plugins, extensions, injected DLLs) and it is likely that a new release will cause more crashes that a release that has been out for 6 weeks already because the developers of this software haven't tested or updated it to work in the new version. One would need to compare the current crash rate in 11 vs. the crash rate in 10 at the same point in the release cycle to come up with meaningful numbers.