Updating fedora core 3
If possible, visit Mozilla's Plugin Check page with another browser that Plugin Check supports (e.g., Safari or Opera) to help identify installed plugins. Update all plugins, uninstall any plugins you no longer need or disable all plugins, to see if that resolves the problem.Attempts to restart the browser may result in multiple instances of Firefox or Sea Monkey in the processes list.You will not be able to start the browser until you first end all browser processes or restart the computer.Updating Firefox may resolve the issue but if the problem persists, download the Firefox setup file from mozilla.org, remove the "Mozilla Firefox" program folder and then reinstall Firefox.This Firefox startup error can occur after performing a Windows System Restore (bug 877143) but whatever the reason, the usual solution is to do a clean reinstall by removing the Firefox program folder and then reinstalling Firefox (there's normally no need to uninstall Firefox before reinstalling it):    This can be caused by an incorrect setting in the Windows registry.You should then delete the program folder for your Mozilla browser and run the installer you previously downloaded.For detailed Firefox instructions, see Standard diagnostic - Firefox#Clean reinstall.
The following plugins have been known to cause startup problems in Mozilla browsers: " depends on version), use another browser to download the Firefox or Sea Monkey installer and save it to your desktop or other location. Firefox may fail to start if the Iolo System Mechanic application is installed.You may see an error message similar to: - Application Error. Internet Explorer, Google Chrome, or other browsers may also fail to start.Alternately, do a clean reinstall (use another browser to download the Firefox installer from and, after first removing the Mozilla Firefox installation directory, reinstall Firefox).   You should now be able to start Firefox.