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Firefox on Windows 10: no access to internet, unable to access different pages (Options page, about:config, about:support, Help > Troubleshooting Information, etc.)

  • 4 trả lời
  • 1 gặp vấn đề này
  • 19 lượt xem
  • Trả lời mới nhất được viết bởi Ankit Kumar

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Hi Support,

since few weeks I am unable to use any Firefox version (from older to the newest) with Windows 10. The issue is really weird because I can start the Firefox application; however, I am unable to connect to internet and I cannot open many Firefox pages like Options, about:config, about:support, Help> Troubleshooting information, etc.

The issue occurs for both standard Firefox installs and with Portable Firefox installs from different sources (, Winpenpack, etc.). Restarting in Safe Mode has not helped.

I am looking for suggestions on how to troubleshoot this issue and hopefully solve it, as Firefox is my preferred browser.

Thanks in advance for any help you may provide! Best regards, Viki

All Replies (4)

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Update: added a screenshot showing two weird things visibile on every Firefox (Standard or portable) :

1) there is a blue line on top of the tab; 2) the field where the url address is typed.

Thanks. Viki


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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}

Start your Computer in safe mode with network support. Then start Firefox. Try Secure websites. Is the problem still there? Starting Any Computer In Safe Mode; Free Online Encyclopedia


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Hi FredMcD,

thanks for your quick reply! Really appreciated! The issue occurs on a work laptop so I will contact our IT Helpdesk team to check your suggestions. I will keep you posted.

Thanks. Best regards, Viki


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Please try after Unblocking Firefox from connecting to the Internet .

please go through the given link:-

Unblock Firefox from connecting to the Internet

thank you..


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