Copyfish is a good alternative to Project Naptha and works in Firefox:

https://ocr.space/copyfish

Yeah, I wonder if there's a more modern version of this somewhere. On-device OCR is probably good enough now that a fully-offline-by-default version of this might make sense, and that's something I might actually use.

Copyfish uses offline OCr.

hehe, I was thinking the same, then I read your comment.

I wish they give support to Firefox in the future, getting text (and even modifying it!) is something I need to do often.

Opening via Firefox shows me this:

> Depending on the number of sign-ups, a Firefox version may be released in a few weeks. If you're interested in Naptha for other browsers, email me.

So they're at the very least considering it.

EDIT: Never mind, it says so since 2014: https://web.archive.org/web/20140425003753/https://projectna...