When I Close firefox v34 I get nsAppShell:EventWindow firefox.exe instruction at "0x05d2230e referenced memory at "0x00000004". The memory could not be "read"
Running Windows XP Pro SP3. Changed a monitor today and at some point afterward, every time I close Firefox, I receive the following Error Message "nsAppShell:EventWindow firefox.exe - Instruction at "0x05d2230e referenced memory at "0x00000004". The memory could not be "read". The next time I start Firefox it seems to work normally. I did try resetting Firefox, but no difference so I restored it to a previous session as the Reset eliminated all of my history, bookmarks, etc.
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Separate Issue; Your System Details shows;
Installed Plug-ins
Adobe PDF Plug-In For Firefox and Netscape 11.0.8 Adobe PDF Plug-In For Firefox and Netscape "9.4.5"
Having more than one version of a program may cause issues.
Start Firefox in Safe Mode {web link} While you are in safe mode;
Type about:preferences#advanced<Enter> in the address bar.
Under Advanced, Select General. Look for and turn off Use Hardware Acceleration.
Poke around safe web sites. Are there any problems?
Hello driadmin, go for a clean re-install, this means you remove Firefox program files and then reinstall Firefox. Please follow these steps:
Note: You might want to print these steps or view them in another browser.
- Download the latest Desktop version of Firefox from this page (full installer) and save the setup file to your computer.
- After the download finishes, close all Firefox windows (or open the Firefox menu
and click the close button 
).
- Delete the Firefox installation folder, which is located in one of these locations, by default on Windows:
- C:\Program Files\Mozilla Firefox
- C:\Program Files (x86)\Mozilla Firefox
Now, go ahead and reinstall Firefox:
- Double-click the downloaded installation file and go through the steps of the installation wizard.
- Once the wizard is finished, choose to directly open Firefox after clicking the Finish button.
More information about reinstalling Firefox can be found here.
WARNING: Do not use a third party uninstaller as part of this process. Doing so could permanently delete your Firefox profile data, including but not limited to, extensions, cache, cookies, bookmarks, personal settings and saved passwords. These cannot be easily recovered unless they have been backed up to an external device! See Back up and restore information in Firefox profiles.
Thank you.