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Firefox won't open on Windows 10 with no error message and appears in the Task Manager

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Installed Firefox this morning and it was running, loaded my profile and had to restart within minutes afterwards, then stopped working and won't run, Only shows in task manager

Already Tried most troubleshooting steps listed below:

- Reinstalled - Cleared out App Data folders - Rebooted multiple times - Moved back to a restore point - Tried flushing dns and winsock reset


Any further suggestions?

Installed Firefox this morning and it was running, loaded my profile and had to restart within minutes afterwards, then stopped working and won't run, Only shows in task manager Already Tried most troubleshooting steps listed below: - Reinstalled - Cleared out App Data folders - Rebooted multiple times - Moved back to a restore point - Tried flushing dns and winsock reset Any further suggestions?

Modified by LifeShifterX

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Additional System Details

Application

  • User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/73.0.3683.103 Safari/537.36

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cor-el
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17087 solutions 154328 answers

Note that doing a Windows System Restore can be dangerous.

Did you do a clean reinstall and delete the Firefox program folder? You can find the full version of the current Firefox release (66.0.3) in all languages and all operating systems here:


Boot the computer in Windows Safe mode with network support to see if that has effect in case security software is causing problems.

You can also do a malware scan.

Note that doing a Windows System Restore can be dangerous. Did you do a clean reinstall and delete the Firefox program folder? You can find the full version of the current Firefox release (66.0.3) in all languages and all operating systems here: *https://www.mozilla.org/en-US/firefox/all/ *https://www.mozilla.org/en-US/firefox/66.0.3/releasenotes/ ---- Boot the computer in Windows Safe mode with network support to see if that has effect in case security software is causing problems. *http://www.bleepingcomputer.com/tutorials/how-to-start-windows-in-safe-mode/ *http://www.7tutorials.com/4-ways-boot-safe-mode-windows-10 You can also do a malware scan. *https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-caused-malware
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Question owner

cor-el said

Note that doing a Windows System Restore can be dangerous. Did you do a clean reinstall and delete the Firefox program folder? You can find the full version of the current Firefox release (66.0.3) in all languages and all operating systems here:

Boot the computer in Windows Safe mode with network support to see if that has effect in case security software is causing problems.

You can also do a malware scan.

I originally only installed the latest 66.0.3, it's a fresh laptop from work. Firefox originally worked aside of when I updated environment variables to use ADB (Android) command line.

''cor-el [[#answer-1214412|said]]'' <blockquote> Note that doing a Windows System Restore can be dangerous. Did you do a clean reinstall and delete the Firefox program folder? You can find the full version of the current Firefox release (66.0.3) in all languages and all operating systems here: *https://www.mozilla.org/en-US/firefox/all/ *https://www.mozilla.org/en-US/firefox/66.0.3/releasenotes/ ---- Boot the computer in Windows Safe mode with network support to see if that has effect in case security software is causing problems. *http://www.bleepingcomputer.com/tutorials/how-to-start-windows-in-safe-mode/ *http://www.7tutorials.com/4-ways-boot-safe-mode-windows-10 You can also do a malware scan. *https://support.mozilla.org/en-US/kb/troubleshoot-firefox-issues-caused-malware </blockquote> I originally only installed the latest 66.0.3, it's a fresh laptop from work. Firefox originally worked aside of when I updated environment variables to use ADB (Android) command line.
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