Shame Firefox has gone and killed many add-ons. I can't even get this new version of Open With to work! I don't even understand what you are telling me, Geoff! Maybe I should ask Santa for some intelligence as a Christmas present!
Look, your extension's preferences highlight a 'click here to download' link, but click after click after click on that link does nothing! No link address opens. Baffled!
One final question: Should Open With work in Waterfox?
Thanks for trying, Geoff, and I've really appreciated your past work, but this newie version of yours is too much like hard work to understand, yet operate. Maybe somebody out there who has written positive feedback will let the rest of us know how on earth you got Open With up and running.