Local theme "corrupt"
Best regards,
At the beginning of 2025, I created a private theme and installed it locally (Windows 10), consisting of a manifest.json and a GIF file. It worked perfectly. Now, on Windows 11, I'm trying to use the theme again, but when I upload the file (.zip or .xpi — via about:addons -> Install Add-on From File), I always get the message that the file is corrupted. However, if I test it temporarily under about:debugging, it works immediately without any issues.
I would really appreciate a solution! <3
All Replies (3)
Hi
I recommend that you ask about this on the official add-ons forum at:
Paul said
Hi I recommend that you ask about this on the official add-ons forum at: https://discourse.mozilla.org/c/add-ons/35
Thank you, I've opened a post there and hope for support! ♥
As a general comment, you cannot install unsigned extensions/themes on the standard release of Firefox. Perhaps you were using the Extended Support Release or Developer Edition on your other computer?
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