Works great for scrobbling from Google Play to both Last.fm and Libre.fm.

Does not work reliably here using FF63 beta. Not all songs get scrobbled to Last.fm when playing music from Google Music. App. only slightly more than half show up in Last.fm. There doesn't seem to be any pattern when it works and when not.

The extension works as expected. I was initially confused on how it worked. Enable a "source" then enable a scrobbler.

Плюсы: в Firefox 59.0a1 x64 дополнение сразу после установки работает так, как заявлено. Минус: в настройках непонятно назначение трех Debugging / Log Level без варианта ~"не вести (и автоматически разработчику отправлять?) лог вообще". После перезагрузки работать перестало.

Works perfectly even with Firefox 57, love it!