partialy working for me now. Noté 5 sur 5 étoiles

download , extract the folder, open/enter the top level folder and zip everything there into a single zip. rename this .zip to .xpi, drag&drop into ffox and install :)
The extension id has changed, no need to remove the original version, in case it might be updated someday.
You spot bugs, you know how to fix ? Fork, fork, fork, folks! Do something!