Merci beaucoup.
En ce qui regarde Firefox Nightly, le problème est à cause du Firefox, et c'est celui-ci: https://github.com/mozilla-mobile/fenix/issues/9691. Aussitôt que cet problème sera remèdié, le plugin devra fonctionner sans défaut à nouveau.

Thanks. You'll be glad to know that at least in Nightly the add-on can be installed again as of now, although unfortunately background playback will still be rather broken due to Firefox currently being a little too aggressive in throttling background tabs.

At least in Nightly it can be installed again now, though unfortunately due to Firefox being a little over-eager in suspending background tabs it won't help much.

It's already installable again on Nightly, although unfortunately this issue (https://github.com/mozilla-mobile/fenix/issues/9691) in Firefox needs fixing as well, so Beta and Release Firefox users might have to wait a little longer.

It's already installable again on Nightly, although unfortunately this issue (https://github.com/mozilla-mobile/fenix/issues/9691) in Firefox needs fixing as well, so Beta and Release Firefox users might have to wait a little longer. (Any workarounds would unfortunately run into the same Firefox bug, so wouldn't really help either)

It's already installable again on Nightly, although unfortunately this issue (https://github.com/mozilla-mobile/fenix/issues/9691) in Firefox needs fixing as well, so Beta and Release Firefox users might have to wait a little longer.