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KB2912390 from Microsoft crashes Firefox in Feb Patch Tuesday. It did not crash IE9.

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Would just send a crash report to Firefox. Would open in safe mode

SuperMicro C7P67 motherboard Windows 7 Professional 64 bit 16 gigs Crucial memory Nvidia GTX 570 video card 1.2 gig memory Two 1 gig WD Black hard drives

Would just send a crash report to Firefox. Would open in safe mode SuperMicro C7P67 motherboard Windows 7 Professional 64 bit 16 gigs Crucial memory Nvidia GTX 570 video card 1.2 gig memory Two 1 gig WD Black hard drives

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We're sorry to hear that your Firefox seems to be crashing when you open it. Please perform the following steps to give us a crash report ID that helps us find out more about the cause of the crash.

  1. Press the following shortcut to get a Run window: [Windows] + [R]. This should bring up a window that contains a text field.
  2. In that text field, enter %APPDATA% and press Enter. An explorer window should open.
  3. From that explorer window, double-click on the Mozilla folder, then double-click on Firefox and then on Crash reports. Double-click on submitted.
  4. Now, you should see a list of files that contain reports. Go to View > Arrange Icons by > Modified to get the most recent files at the top of the window.
  5. Open the most recent 5 files with a text editor and copy the IDs.
  6. Paste each ID with bp- into the reply window on the forums.

Thanks in advance!

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In Firefox Safe mode these changes are effective:

  • all extensions are disabled (about:addons)
  • default theme is used (no persona)
  • userChrome.css and userContent.css are ignored (chrome folder)
  • default toolbar layout is used (file: localstore-safe.rdf)
  • Javascript JIT compilers are disabled (prefs: javascript.options.*jit)
  • hardware acceleration is disabled (Options > Advanced > General)
  • plugins are not affected
  • preferences are not affected

See:

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Solved the problem. When Microsoft upgraged me to IE 10 which screwed up my computer, Microsoft installed KB 2670838. KB 2912390 updated this fix and caused Firefox to crash. When I uninstalled KB 2670838 and hid that update, the problem went away and I am back browsing in Mozilla's arms.