FireFox support
Is there a way to use it with firefox? other that that it works very well
Unfortunately, Firefox is not currently supported. As far as I know, there isn't an easy way to run the extension without getting it signed by Mozilla. Unless you run a dev/nightly/unbranded build of Firefox (see their FAQ), the only way to run unsigned extensions (using Firefox's equivalent of Chrome's "load unpacked" mechanism) removes the extension on every browser restart.
If there's strong demand for Firefox support, I suppose I (or a volunteer) could set up proper packaging and signing for each release.
That said, I just merged in a small fix that makes the code compatible with Firefox. If you're ok with Firefox's limitations on unsigned extensions, or if you get it signed, the extension does work.
FWIW I tested this end to end (via a private upload of the extension) and it Just Works. It just requires automation to sign.
I volunteer as tribute to submit and maintain the Firefox Add-on. I've been using the extension for a really long time, and have somewhat recently switch to Firefox as my daily driver, so am in a good position to maintain it. As @grimreaper noted, it works well as-is, with a minor addition for manifest v3 (I'll send a PR shortly).