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Big Sur Update & Firefox are not friendly.

  • 1 reply
  • 1 has this problem
  • Last reply by Bithiah

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I just recently updated my Macbook Air to Big Sur and downloaded Firefox to use as my default browser. Installation went smoothly and I am able to use the program as intended. When I click on an external link, an window pops up and tells I do not have permission to open the app and to contact my computer or network administrator for support.

I am not computer savvy when it comes to programming and would love any help anyone has to offer.

Most appreciative.

All Replies (1)

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Hey there!

Well recently after the Big Sur was taken out, a lot of people did find problems on their mac. Interstingly for my iMac (Retina 4K, 21.5-inch, 2017) is working perfectly fine with the Big Sur update with Firefox as default browser.

Please see the links below for some help and guidance:

Common fixes -

If you want to rollback firefox you can and you can do so by seeing the steps in the link below: Rollingback does fix a lot of people's issues.

Hope I helped!

Kind regards,



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