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Firefox 68.0 totally unresponsive - opens will not load websites, cannot access options menu

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After w10 upgrade to build 1903 firefox totally unresponsive. Other browsers work fine as does tbird, Version 67 also did not work. Tried uninstalling and reinstalling and safe mode and no addons and refresh - nothing is working. please help.

After w10 upgrade to build 1903 firefox totally unresponsive. Other browsers work fine as does tbird, Version 67 also did not work. Tried uninstalling and reinstalling and safe mode and no addons and refresh - nothing is working. please help.
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jscher2000
  • Top 10 Contributor
8583 solutions 70209 answers

As an experiment, could you temporarily hide your Firefox data folder from Firefox and see whether Firefox can create a new one and start up? Here's how:

Paste the following shortcut path into the Windows 10 system search box and press Enter to launch it in File Explorer:

%APPDATA%\Mozilla

That should expand into the hidden folder:

C:\Users\username\AppData\Roaming\Mozilla

Right-click the Firefox folder and use Rename to change it to FirefoxOLD (or Firefox1, etc.).

When Firefox starts, it should determine that it doesn't have a data folder and create one. Will it operate?

As an experiment, could you temporarily hide your Firefox data folder from Firefox and see whether Firefox can create a new one and start up? Here's how: Paste the following shortcut path into the Windows 10 system search box and press Enter to launch it in File Explorer: %APPDATA%\Mozilla That should expand into the hidden folder: C:\Users\''username''\AppData\Roaming\Mozilla Right-click the Firefox folder and use Rename to change it to FirefoxOLD (or Firefox1, etc.). When Firefox starts, it should determine that it doesn't have a data folder and create one. Will it operate?
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Question owner

Thank you. No help - same behavior as before meaning nothing. Cannot open Preferences and no internet access.

Thank you. No help - same behavior as before meaning nothing. Cannot open Preferences and no internet access.
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jscher2000
  • Top 10 Contributor
8583 solutions 70209 answers

Another user reported that a policy in the Symantec Endpoint Protection security software caused a similar behavior (1264492). By any chance do you have that software running on your system?

Another user reported that a policy in the Symantec Endpoint Protection security software caused a similar behavior ([https://support.mozilla.org/questions/1264492 1264492]). By any chance do you have that software running on your system?
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Question owner

I use Norton Security but disabling it did not solve the problem.

I use Norton Security but disabling it did not solve the problem.
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jscher2000
  • Top 10 Contributor
8583 solutions 70209 answers

Some other users reported problems with Win10 1903 + Firefox 67 or 68, but I don't see a clear pattern or proven solution. Hopefully another volunteer will have a theory.

Some other users reported problems with Win10 1903 + Firefox 67 or 68, but I don't see a clear pattern or proven solution. Hopefully another volunteer will have a theory.
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