A routine upgrade offer came through this morning and I accepted and continued working on my PC. Later, I could not open Firefox by using Desktop or Programmes. I rebooted my PC with the same results. I thought of uninstalling and reinstalling but thought that maybe someone could offer a quick fix.
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Does Firefox Crash? Have you scanned for malware? Firefox 18 crashes on startup due to malware - how to fix? Do you have websense endpoint on your computer?
No, it doesn't crash, it doesn't even open. Clicking the icon on the desktop, or Start, Programmes, Firefox gets no respose at all. Even clicking on the email link has no effect, as Firefox is my defaut browser. I have Kaspersky antivirus/Internet protection running all the time, so I presume I have been protected against malware. I do not know what websense endpoint is, so I doubt if it is on my PC. Would welcome any further suggestions. Thanks, Mike
Please run the malware programs I suggested, then try to reinstall Firefox.
A possible cause is security software (firewall,anti-virus) that blocks or restricts Firefox or the plugin-container process without informing you, possibly after detecting changes (update) to the Firefox program.
Remove all rules for Firefox and the plugin-container from the permissions list in the firewall and let your firewall ask again for permission to get full unrestricted access to internet for Firefox and the plugin-container process and the updater process.
No Malware detected. Uninstalled and reinstalled and it works perfectly. Thanks.