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new win 10 install firefox won't open sites

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  • Seneste svar af FredMcD

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Installed newest version of Win 10, then installed Firefox six times now, Firefox will not open any site entered in URL box. Why is this happening. Both Chrome and MS Edge work.

Installed newest version of Win 10, then installed Firefox six times now, Firefox will not open any site entered in URL box. Why is this happening. Both Chrome and MS Edge work.
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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.

[56+] Type about:preferences#general<enter> in the address bar. Look for 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.