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Firefox won't start after fresh re-install

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Problem = "Firefox is already running but is not responding" error. Firefox does not open a browser window. I uninstalled firefox, deleted the necessary files in the registry and deleted / backed-up all my profiles.

Still doesn't open. I cannot terminate the firefox.exe in the taskmanager. I also tried to open firefox in safe mode.

my profile.ini looks like this after the reinstall :

[Install308046B0AF4A39CB] Default=Profiles/br44he6u.default-release Locked=1

[Profile1] Name=default IsRelative=1 Path=Profiles/saqp6yc1.default Default=1

[Profile0] Name=default-release IsRelative=1 Path=Profiles/br44he6u.default-release

[General] StartWithLastProfile=1 Version=2

My installs.ini :

[308046B0AF4A39CB] Default=Profiles/br44he6u.default-release Locked=1


Registry files deleted before reinstall :

HKEY_CLASSES_ROOT\FirefoxHTML; HKEY_CURRENT_USER\Software\Mozilla; HKEY_CURRENT_USER\Software\MozillaPlugins; HKEY_LOCAL_MACHINE\SOFTWARE\Mozilla; HKEY_LOCAL_MACHINE\SOFTWARE\MozillaPlugins.

Problem = "Firefox is already running but is not responding" error. Firefox does not open a browser window. I uninstalled firefox, deleted the necessary files in the registry and deleted / backed-up all my profiles. Still doesn't open. I cannot terminate the firefox.exe in the taskmanager. I also tried to open firefox in safe mode. my profile.ini looks like this after the reinstall : [Install308046B0AF4A39CB] Default=Profiles/br44he6u.default-release Locked=1 [Profile1] Name=default IsRelative=1 Path=Profiles/saqp6yc1.default Default=1 [Profile0] Name=default-release IsRelative=1 Path=Profiles/br44he6u.default-release [General] StartWithLastProfile=1 Version=2 My installs.ini : [308046B0AF4A39CB] Default=Profiles/br44he6u.default-release Locked=1 Registry files deleted before reinstall : HKEY_CLASSES_ROOT\FirefoxHTML; HKEY_CURRENT_USER\Software\Mozilla; HKEY_CURRENT_USER\Software\MozillaPlugins; HKEY_LOCAL_MACHINE\SOFTWARE\Mozilla; HKEY_LOCAL_MACHINE\SOFTWARE\MozillaPlugins.
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Additional System Details

Installed Plug-ins

adblockplus

Application

  • User Agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.100 Safari/537.36

More Information

My_Cheese_Is_Slippin'
  • Top 25 Contributor
18 solutions 250 answers

Hi Wolf_1981, There have been issues lately with Win 7 x64. Try a Clean Install with the 32-bit version. Firefox keeps crashing at startup Scroll down to Try a clean install.

Hi Wolf_1981, There have been issues lately with Win 7 x64. Try a Clean Install with the 32-bit version. [https://support.mozilla.org/en-US/kb/firefox-keeps-crashing-startup Firefox keeps crashing at startup] Scroll down to Try a clean install.
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