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Just installed your update this morning (on another computer), and now I cannot access the internet.

  • 3 replies
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  • Last reply by FredMcD

14anna
14anna
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After installing new Firefox update, I can no longer access the internet with it. I then uninstalled, reinstalled Firefox, then rebooted several times, and still cannot reach the internet with Firefox. All other programs, and browsers work fine. Firefox worked fine before installing update this morning.

Any suggestions? AnnaBelle

After installing new Firefox update, I can no longer access the internet with it. I then uninstalled, reinstalled Firefox, then rebooted several times, and still cannot reach the internet with Firefox. All other programs, and browsers work fine. Firefox worked fine before installing update this morning. Any suggestions? AnnaBelle

All Replies (3)

Shadow110
Shadow110
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Please uninstall Firefox. Then Delete the Mozilla Firefox Folders in C:\Program Files and C:\Program Files(x86) Then restart system. Then run Windows Disk Cleanup. Then run it again and click the button that says Cleanup System Files. Note: your Firefox Profile is saved. But you should make a back up before you do : https://support.mozilla.org/en-US/kb/back-and-restore-information-firefox-profiles

Reinstall with Current Release Firefox 57.0 with a Full Version Installer https://www.mozilla.org/firefox/all/

Please let us know if this solved your issue or if need further assistance.

14anna
14anna Question owner
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Followed the instructions above--did not resolve the issue of connecting to the internet. After that, opened Firefox's Safe Mode--did not resolve issue.

FredMcD
FredMcD
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Some problems occur when your Internet security program was set to trust the previous version of Firefox, but no longer recognizes your updated version as trusted. Now how to fix the problem: To allow Firefox to connect to the Internet again;

  • Make sure your Internet security software is up-to-date (i.e. you are running the latest version).
  • Remove Firefox from your program's list of trusted or recognized programs. For detailed instructions, see

Configure firewalls so that Firefox can access the Internet. {web link}

Type about:preferences#advanced<Enter> in the address bar.

Under Advanced, Select Network. Look for Configure How Firefox Connects and press the Settings button. If you are using a proxy, make sure those settings are correct. If there is no proxy, first try No Proxy. If there is a problem, then try System Proxy.