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Firefox error message: A required privilege is not held by the client.

Posted

I tried to open Firefox yesterday and got the following error message:

Mozilla-Firefox 64bit. A required privilege is not held by the client.

I uninstalled Firefox thinking that reinstalling would fix the problem but when I attempted to reinstall Firefox I got the same error message.

This is on a Windows 10 64bit machine.

I tried to open Firefox yesterday and got the following error message: Mozilla-Firefox 64bit. A required privilege is not held by the client. I uninstalled Firefox thinking that reinstalling would fix the problem but when I attempted to reinstall Firefox I got the same error message. This is on a Windows 10 64bit machine.

Chosen solution

Update: I restored the hard drive from a backup that I made a few weeks ago and that has solved the problem - Firefox is working normally again. I have no idea what caused the problem.

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Additional System Details

Installed Plug-ins

  • Shockwave Flash 32.0 r0

Application

  • User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:72.0) Gecko/20100101 Firefox/72.0

More Information

FredMcD
  • Top 10 Contributor
4385 solutions 61533 answers

Web search; https://www.bing.com/search?q=required+privilege+is+not+held+by+the+client


Did you use the normal install or make changes?

Web search; https://www.bing.com/search?q=required+privilege+is+not+held+by+the+client Did you use the normal install or make changes?

Modified by FredMcD

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Question owner

Thank you for that search/links. I have tried a normal install and with administrator privileges, and with the anti-virus deactivated.

Thank you for that search/links. I have tried a normal install and with administrator privileges, and with the anti-virus deactivated.
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FredMcD
  • Top 10 Contributor
4385 solutions 61533 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
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Question owner

In safe mode with network support the installation progress bar reached about 90% then stopped with the following error message:

Firefox Installer. Hmm. For some reason we could not install Firefox. Choose OK to start again.

In safe mode with network support the installation progress bar reached about 90% then stopped with the following error message: Firefox Installer. Hmm. For some reason we could not install Firefox. Choose OK to start again.
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FredMcD
  • Top 10 Contributor
4385 solutions 61533 answers

I called for more help.

I called for more help.
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Question owner

OK, I appreciate that.

OK, I appreciate that.
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CasinoRus 0 solutions 1 answers

Eddie said

I tried to open Firefox yesterday and got the following error message: Mozilla-Firefox 64bit. A required privilege is not held by the client. I uninstalled Firefox thinking that reinstalling would fix the problem but when I attempted to reinstall Firefox I got the same error message. This is on a Windows 10 64bit machine.

Had the same problem; started in safe mode and it was gone. And I also reinstalled Firefox before.

''Eddie [[#question-1278495|said]]'' <blockquote> I tried to open Firefox yesterday and got the following error message: Mozilla-Firefox 64bit. A required privilege is not held by the client. I uninstalled Firefox thinking that reinstalling would fix the problem but when I attempted to reinstall Firefox I got the same error message. This is on a Windows 10 64bit machine. </blockquote> Had the same problem; started in safe mode and it was gone. And I also reinstalled Firefox before.
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Chosen Solution

Update: I restored the hard drive from a backup that I made a few weeks ago and that has solved the problem - Firefox is working normally again. I have no idea what caused the problem.

Update: I restored the hard drive from a backup that I made a few weeks ago and that has solved the problem - Firefox is working normally again. I have no idea what caused the problem.
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FredMcD
  • Top 10 Contributor
4385 solutions 61533 answers

Helpful Reply

That was very good work. Well Done. Please flag your last post as Solved Problem as this can help others with similar problems.

That was very good work. Well Done. Please flag your last post as '''Solved Problem''' as this can help others with similar problems.
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Question owner

Solved problem.

Solved problem.
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