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Firefox very unstable, gives me prompts to close Firefox before opening new content, blocking content, etc.

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  • 0 有這個問題
  • 15 次檢視
  • 最近回覆由 cor-el

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After a trip on which I used several other internet connections, my Firefox has become very unstable. It is prompting me to shut down Firefox in order to open the next window. It is also flickering on the refresh icon. It is also blocking adult content. I have refreshed the Firefox browser but that changed nothing. I am not sure how to troubleshoot to look specifically at these problems. I am fearful of trying to delete and reinstall this program as I do not use any other online browsers and do not want to install them. Can this be troubleshooted remotely without risking malware?

After a trip on which I used several other internet connections, my Firefox has become very unstable. It is prompting me to shut down Firefox in order to open the next window. It is also flickering on the refresh icon. It is also blocking adult content. I have refreshed the Firefox browser but that changed nothing. I am not sure how to troubleshoot to look specifically at these problems. I am fearful of trying to delete and reinstall this program as I do not use any other online browsers and do not want to install them. Can this be troubleshooted remotely without risking malware?

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Can you attach a screenshot?

Are you using a proxy or VPN?

You can check the connection settings.

  • Settings -> General -> Network: Connection -> Settings

If you do not need to use a proxy to connect to internet, select "No Proxy" if "Use the system proxy settings" or one of the others do not work properly.

See "Firefox connection settings":


You can try these steps in case of issues with webpages:

You can reload webpage(s) and bypass the cache to refresh possibly outdated or corrupted files.

  • hold down the Shift key and left-click the Reload button
  • press "Ctrl + F5" or press "Ctrl + Shift + R" (Windows,Linux)
  • press "Command + Shift + R" (Mac)

Clear the Cache and remove the Cookies for websites that cause problems via the "3-bar" Firefox menu button (Settings).

"Remove the Cookies" for websites that cause problems:

  • Settings -> Privacy & Security
    Cookies and Site Data: "Manage Data"

"Clear the Cache":

  • Settings -> Privacy & Security
    Cookies and Site Data -> Clear Data -> [X] Cached Web Content -> Clear

Start Firefox in Troubleshoot Mode to check if one of the extensions ("3-bar" menu button or Tools -> Add-ons -> Extensions) or if hardware acceleration or if userChrome.css/userContent.css is causing the problem.

  • switch to the Default System theme: "3-bar" menu button or Tools -> Add-ons -> Themes
  • do NOT click the "Refresh Firefox" button on the Troubleshoot Mode start window