The new upgrade to Firefox 4.0 has rendered the browser useless. Even older versions will no longer open. How do I get any version of Firefox to load again?

When I upgraded to Firefox 4.0 I continually got error messages but the browser would still work when I cleared them. After the upgrade April 29 the browser worked until the computer was shut down.Next day it won't load.I tried to install older versions but they just get automatically "upgraded".This is from my laptop which I did not upgrade to 4.0 after my desktop issues.The error message I get when I try to load the browser is above.

Do a clean (re-)install:
* Download a fresh Firefox copy and save the file to the desktop.
* Firefox 4.0.x: http://www.mozilla.com/en-US/firefox/all.html
* Firefox 3.6.x: http://www.mozilla.com/en-US/firefox/all-older.html
* Uninstall your current Firefox version and remove the Firefox program folder before installing that copy of the Firefox installer.
* Do not remove personal data if you uninstall the current version.
* It is important to delete the Firefox program folder to remove all the files and make sure that there are no problems with files that were leftover after uninstalling.
Your bookmarks and other profile data are stored elsewhere (not in the Firefox program folder) and won't be affected by a reinstall, but make sure that you do not select to remove personal data if you uninstall Firefox.

Similar Messages

Maybe you are looking for