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Firefox will not open. APPCRASH immediately at startup

Posted

Try to open and immediately get dialog box “Firefox has stopped working”. Event name: APPCRASH Version 65.0.0.6963

Can’t open in safe mode either. Have reinstalled five times and am having the same issues. Can’t access profiles.

Try to open and immediately get dialog box “Firefox has stopped working”. Event name: APPCRASH Version 65.0.0.6963 Can’t open in safe mode either. Have reinstalled five times and am having the same issues. Can’t access profiles.

Additional System Details

Application

  • User Agent: Mozilla/5.0 (iPhone; CPU iPhone OS 12_1_2 like Mac OS X) AppleWebKit/605.1.15 (KHTML, like Gecko) Version/12.0 Mobile/15E148 Safari/604.1

More Information

FredMcD
  • Top 10 Contributor
4222 solutions 58926 answers

What's your computer system and Firefox version?

Let’s do a full clean re-install;

Download Firefox For All languages And Systems {web link}

Save the file. Then Close Firefox.

Using your file browser, open the Programs Folder on your computer.

Windows: C:\Program Files C:\Program Files (x86) Note: Check Both Folders

Mac: Open the "Applications" folder. https://support.mozilla.org/en-US/kb/how-download-and-install-firefox-mac

Linux: Check your user manual. If you installed Firefox with the distro-based package manager, you should use the same way to uninstall it. See Install Firefox on Linux; https://support.mozilla.org/en-US/kb/install-firefox-linux

If you downloaded and installed the binary package from the Firefox download page, simply remove the folder Firefox in your home directory. http://www.mozilla.org/firefox#desktop ++++++++++++++++++++++++++++ Look for, and remove any Mozilla or Firefox program folders. Do not remove the Mozilla Thunderbird folder if there is one.

Do Not remove any profile folders.

After rebooting the computer, run a registry scanner if you have one. Then run the installer. +++++++++++++++++++++++++++ If there is a problem, start your Computer in safe mode and try again.

http://encyclopedia2.thefreedictionary.com/Linux+Safe+Mode This shows how to Start all Computers in Safe Mode; Free Online Encyclopedia

What's your computer system and Firefox version? Let’s do a full clean re-install; [http://www.mozilla.org/en-US/firefox/all/ Download Firefox For All languages And Systems] {web link} Save the file. Then '''Close Firefox. ''' Using your file browser, open the '''Programs Folder''' on your computer. '''Windows: ''' C:\Program Files C:\Program Files (x86) '''Note:''' Check Both Folders '''Mac: ''' Open the ''' "Applications" ''' folder. https://support.mozilla.org/en-US/kb/how-download-and-install-firefox-mac '''Linux: ''' Check your user manual. If you installed Firefox with the distro-based package manager, you should use the same way to uninstall it. See Install Firefox on Linux; https://support.mozilla.org/en-US/kb/install-firefox-linux If you downloaded and installed the binary package from the Firefox download page, simply remove the folder Firefox in your home directory. http://www.mozilla.org/firefox#desktop ++++++++++++++++++++++++++++ Look for, and remove any '''Mozilla''' or '''Firefox''' program folders. Do not remove the '''Mozilla Thunderbird''' folder if there is one. '''Do Not''' remove any profile folders. After rebooting the computer, run a registry scanner if you have one. Then run the installer. +++++++++++++++++++++++++++ If there is a problem, start your '''Computer''' in safe mode and try again. http://encyclopedia2.thefreedictionary.com/Linux+Safe+Mode This shows how to Start all Computers in Safe Mode; Free Online Encyclopedia

Question owner

OS version: Windows 7 Enterprise Firefox version: 65.0.0.6963

Have done a clean install multiple times. Can’t open in Firefox “safe mode” nor when installing new version in windows safe mode.

OS version: Windows 7 Enterprise Firefox version: 65.0.0.6963 Have done a clean install multiple times. Can’t open in Firefox “safe mode” nor when installing new version in windows safe mode.
FredMcD
  • Top 10 Contributor
4222 solutions 58926 answers

Start your Computer in safe mode with network support. Then start Firefox. Try Secure websites. Is the problem still there?

http://encyclopedia2.thefreedictionary.com/Linux+Safe+Mode Starting Any Computer In Safe Mode; Free Online Encyclopedia

Start your '''Computer''' in safe mode with network support. Then start Firefox. Try '''Secure''' websites. Is the problem still there? http://encyclopedia2.thefreedictionary.com/Linux+Safe+Mode Starting Any Computer In Safe Mode; Free Online Encyclopedia

Question owner

After re-installing 4 times, it finally works in Windows safe mode and can access sites. Still not working in normal mode and receiving the APPCRASH box

After re-installing 4 times, it finally works in Windows safe mode and can access sites. Still not working in normal mode and receiving the APPCRASH box
FredMcD
  • Top 10 Contributor
4222 solutions 58926 answers

I called for help.

I called for help.