dobladov
commented
2 years ago For the moment, I have downgraded the Firefox version of the add-on to manifest v2. All seems to be working except notifications. https://addons.mozilla.org/en-US/firefox/addon/youtube2anki/
As much as I want to support this browser (the extension was initially made for Firefox), at the moment Manifest v3 it's not supported by addons.mozilla, there's already a branch with support for Firefox with the experimental v3 manifest enabled and a package: youtube2anki-1.4.0.zip
You can add the add-on manually and use it without a problem. Until the store adds support, this issue will be blocked.