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FYI: Microsoft update for Windows 7 KB2670838 (date 2/28/2013) kills Firefox

Posted

Spent the entire morning troubleshooting this.

KB2670838 prevents FF from starting except in safe mode.

I downgraded from 19.0 to 18.0, same problem.

Went thru my entire system, reinstalled FF, nothing. The only difference in my system this AM was the MS update above. I removed it, rebooted and FF worked fine.

Spent the entire morning troubleshooting this. KB2670838 prevents FF from starting except in safe mode. I downgraded from 19.0 to 18.0, same problem. Went thru my entire system, reinstalled FF, nothing. The only difference in my system this AM was the MS update above. I removed it, rebooted and FF worked fine.

Modified by izaakb

Additional System Details

Installed Plug-ins

  • Shockwave Flash 11.6 r602
  • Adobe PDF Plug-In For Firefox and Netscape 10.1.6
  • Next Generation Java Plug-in 10.9.2 for Mozilla browsers
  • NPRuntime Script Plug-in Library for Java(TM) Deploy
  • SiteAdvisor
  • Adobe PDF Plug-In For Firefox and Netscape 10.1.4
  • 5.1.10411.0
  • The plug-in allows you to open and edit files using Microsoft Office applications
  • Office Authorization plug-in for NPAPI browsers

Application

  • User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:19.0) Gecko/20100101 Firefox/19.0

More Information

Tyler Downer
  • Top 25 Contributor
  • Administrator
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1196 solutions 7842 answers

Helpful Reply

You can install that update and use Firefox if you Disable Hardware Acceleration in Firefox Turning off hardware acceleration

You can install that update and use Firefox if you Disable Hardware Acceleration in Firefox [[Upgrade your graphics drivers to use hardware acceleration and WebGL#w_turning-off-hardware-acceleration|Turning off hardware acceleration]]