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Cannot install any add-ons or themes: "Download failed. Please check your connection."

Hi, I cannot download & installed any add-ons or themes. After clicking the install button, I always get a red bar saying "Download failed. Please check your connect… (læs mere)

Hi,

I cannot download & installed any add-ons or themes. After clicking the install button, I always get a red bar saying "Download failed. Please check your connection.". This happens on Firefox, Firefox beta and Firefox nightly.

I did some googling and found similar posts from a few years ago. These seem to suggest I don't have the correct certificate used to verify extension signatures:

I checked my certificates and I don't have anything from "Mozilla Corporation - signingca1.addons.mozilla.org" (there's a screenshot of this cert in the first forum link above), so I think this is indeed the issue? I've attached a screenshot of my cert list where the Mozilla cert should be.

Please note I am on an M3 Pro macbook pro. It's a work laptop and I thought maybe our network settings were interfering with things, but my previous work laptop (Intel) could install add-ons just fine.

Would appreciate some help!

P.S. I found a workaround where I copied over all extension JSON and XPI files from my old laptop. So I am using my previous extensions just fine but still cannot download any new ones. Also I don't have access to my old laptop anymore so can't copy over any new ones.

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Seneste svar af zeroknight for for 2 måneder siden

I set Firefox to default browser but Edge launches when clicking a link

I recently got a new computer (HP Dragonfly) and set Firefox as my default browser but when I click on a link from Outlook it opens in Edge. I'm using Windows11. I hav… (læs mere)

I recently got a new computer (HP Dragonfly) and set Firefox as my default browser but when I click on a link from Outlook it opens in Edge. I'm using Windows11. I have: 1) Confirmed in Firefox settings that Firefox is the default 2) Confirmed in Edge settings that Edge is not the default browser 3) Confirmed in Windows default settings that Firefox is the default browser 4) Ensured in Outlook-Options-Advanced that "Open Hyperlinks in from Outlook" is set to "Default Browser" 5) Uninstalled and reinstalled Firefox. Also restarted my computer several times And yet, clicking on links from Outlook continues to open Edge. Please help I really don't like Edge!

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my computer updated and i lost firefox

My computer updated with no warning one night, and i lost all personalization and even everything stored in my firefox, the sign ins, passwords, bookmarks, all. is there… (læs mere)

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Firefox has ended support for Windows 8 and Vista but I don't use these and therefore can no longer update - why

I have been using Firefox for ages and never had a problem - love it - but now I see the remark: Firefox has ended support for Windows 8 and Vista on my screen at the rig… (læs mere)

I have been using Firefox for ages and never had a problem - love it - but now I see the remark: Firefox has ended support for Windows 8 and Vista on my screen at the right top corner. It also will no longer update my computer.

I do have and use Windows 10 - so I don't see what is the problem? I tried to refresh and that didn't work either.

Please help because I like to stay with Firefox but I do need to update and keep my computer secure.

I am not very computer savy so please tell me what to do in simple word.

Thank you for your help Christine

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I just updated my Firefox browser. Now it doesn't work: "tab is crashed" - an endless chain, always again this. You should try harder to release bugfree software ... Wh… (læs mere)

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You should try harder to release bugfree software ...

What about short-time help?

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unable to recover my saved bookmarks and history

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My email address has to change as Internode has closed down

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