The extension uses
Google Cloud Functions, please make sure your network can access
https://us-central1-spotify-lyrics-ef482.cloudfunctions.net, if you need a proxy to access Google services, it is recommended to add
cloudfunctions.net
to the whitelist.
Right click on the lyrics button to open options.
You can install WebApp(PWA) instead of desktop client.
Note: Deezer does not currently support installation, but creating shortcut(use "Open as window") can also run in a similar way to desktop applications, detail.
In addition to Spotify, YouTube Music, Apple Music, Deezer, Tidal is now supported. detail.