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New version e86 en-US does not work in the UK, all I get is a blank page

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I upgraded to the newer version of Firefox 50.0.2 (x86 en-US) and all I can see is a completely blank page. I downgraded to the older version 49.0.2 (US English) which works perfectly but every time I switch on my laptop Firefox auto updates to the newer version which does not work.

I upgraded to the newer version of Firefox 50.0.2 (x86 en-US) and all I can see is a completely blank page. I downgraded to the older version 49.0.2 (US English) which works perfectly but every time I switch on my laptop Firefox auto updates to the newer version which does not 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}