(In reply to [:philipp] from comment #3) > 80.0a1 build 20200705214003 seems to have been the first nightly build affected by the problem. this would have been the patches landing the day before: https://hg.mozilla.org/mozilla-central/pushloghtml?startdate=2020-07-04&tochange=6087e976924f95018479c6f5881878c95b8bd8e2 > > those 4 bugs look related to macos and/or gfx in particular: https://bugzilla.mozilla.org/buglist.cgi?bug_id=1649490,1647565,1647186,1324591 2020-07-05 was when Mozilla started pushing Firefox users on older versions of OS X (pre 10.12) to the ESR branch. Crashes on the release branch are throttled (at about the rate of 1 in 10), but those on ESR releases aren't. So there are *many* bugs that show a substantial increase in crash numbers starting on that date. (All the other ones I know about are security bugs, so I won't list them here.) Looking the crash stats in "Crash Data" now, I notice a large increase starting just after 2020-08-25. That, too, may be an artifact. But until we know otherwise, it's a better place to look for possible triggers for this bug. The bug itself is almost certainly an Apple bug, in one or more of their graphics drivers. But if we can find the trigger, it may be possible to work around it.
Bug 1664843 Comment 12 Edit History
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(In reply to [:philipp] from comment #3) > 80.0a1 build 20200705214003 seems to have been the first nightly build affected by the problem. this would have been the patches landing the day before: https://hg.mozilla.org/mozilla-central/pushloghtml?startdate=2020-07-04&tochange=6087e976924f95018479c6f5881878c95b8bd8e2 > > those 4 bugs look related to macos and/or gfx in particular: https://bugzilla.mozilla.org/buglist.cgi?bug_id=1649490,1647565,1647186,1324591 2020-07-05 was when Mozilla started pushing Firefox users on older versions of OS X (pre 10.12) to the ESR branch. Crashes on the release branch are throttled (at about the rate of 1 in 10), but those on ESR releases aren't. So there are *many* bugs that show a substantial increase in crash numbers starting on that date. (All the other ones I know about are security bugs, so I won't list them here.) Looking at the crash stats in "Crash Data" now, I notice a large increase starting just after 2020-08-25. That, too, may be an artifact. But until we know otherwise, it's a better place to look for possible triggers for this bug. The bug itself is almost certainly an Apple bug, in one or more of their graphics drivers. But if we can find the trigger, it may be possible to work around it.