@koraka thanks for the report and for the link - that made it easy to check and reproduce the error. The file itself is fine.
A first install on a freshly downloaded file does work - I installed that exact .crx on both macOS and iPadOS. But if you remove the extension and reinstall from the same file, it fails, and every retry after that gives "Invalid extension". That's why re-checking the format never helped.
Two workarounds you can try while we work on the fix:
- The
.crx you already have can be installed by renaming it to .zip.
- Or delete it, download a fresh copy, and install. Don't retry the same file -
delete and re-download instead.
Hope that helps.