Possible migration to Manifest V3?

[zplan]

The extension is currently shown as not compatible with Manifest v3 and therefore deactivated soon.
Would it be possible to migrate the extension to make it Manifest v3 compatible?

[seansfkelley]

I'm open to it and would accept a PR, as long as it continues to be compatible with both Firefox and Chromium-based browsers (which might be a little annoying since one demands service workers and the other background pages, though maybe just specifying both will Just Work?). I'm unlikely to address this myself in the near future due to time contraints.