Yes, very good

stopped working (feb-2018)
documentation directs to chrome version

Awesome and THANKS

Love this extension, but just upgraded to Firefox 60.5 ESR and it does not function correctly using this version of Firefox. Will this issue be corrected?

Appears to work just fine with the stable version of Firefox 65.

i'm using this extension since 3 years now, and i'm absolutely satisfied !

nie ma innego dodatku. na chrome i na ff. ten jest jedyny!!!!

I'd been using Savard's Checker Plus for years with another browser. I'm glad to see it works just as well on Firefox. :)

Been using this on chrome and have contributed too, but for me the firefox version is pretty "laggy" as in the framerate is pretty low, compared to the chrome version. Is it supposed to happen? Other extensions run at a full 60 fps for me.

Edit: Fixed low framerate by downgrading to the previous version.