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Won't load pages on desktop

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For the last week or so, Firefox on my desktop has opened to a blank new tab screen, and won't load any other pages. It won't even load support.mozilla.org, I'm asking this on my phone! I've had to use Edge on the occasions that I CAN'T use my mobile for the task; printing shipping labels, downloading a better art program, that sort of thing. I'd really rather NOT use Edge at all, thanks.

For the last week or so, Firefox on my desktop has opened to a blank new tab screen, and won't load any other pages. It won't even load support.mozilla.org, I'm asking this on my phone! I've had to use Edge on the occasions that I CAN'T use my mobile for the task; printing shipping labels, downloading a better art program, that sort of thing. I'd really rather NOT use Edge at all, thanks.

Ausgewählte Lösung

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}

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Ausgewählte Lösung

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}

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You can check for issues caused by a corrupted or incomplete Visual C++ installation that is missing runtime components (Redistributable Packages) required by Firefox.

See "Visual Studio 2015, 2017 and 2019":

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@cor-el what do you mean by that. I'm not at all a programmer and am ABSOLUTELY a novice at any kind of code.