Companion for YouTube Music puts a full mini player in your toolbar, so you can control music.youtube.com without ever switching tabs.

Player: album art, per-artist links, play/pause, previous/next, like/dislike, shuffle, repeat, seek and volume
Home: YouTube Music's own recommendation shelves inside the popup - pick a song and it starts a radio from it
Queue: see what's coming with artwork, jump to any track, play next, add to queue, remove, drag to reorder; autoplay suggestions are labeled and toggleable
History: your real YouTube Music listening history, click to replay
Search: songs and videos - play them, queue them or start a radio from them
Playlists: browse your library, play any playlist, or add the current song to one
Lyrics: time-synced lyrics from LRCLIB with a live highlight; strictly opt-in and limited to official songs
Start a radio from any track row, anywhere in the popup
Row actions you can switch off in settings, so rows carry only what you use
Sleep timer with presets and custom minutes
Keyboard shortcuts you can rebind right in the popup
Dark, light or system theme with eight accent colors - or the dynamic accent that follows the album art - plus an optional accent-colored toolbar icon
Compact mode: collapse the popup to just the player card

Privacy: no analytics, no tracking, no data collection. Everything runs against your open YouTube Music tab with your existing session. The only external request is the opt-in lyrics lookup, which sends the current track's title and artist to lrclib.net - nothing else, nowhere else. Open source under GPL-3.0: https://github.com/benesmartin/youtube-music-companion Bug reports and ideas welcome on GitHub :) If it makes your listening nicer: https://ko-fi.com/benesmartin This is an independent project, not affiliated with or endorsed by Google or YouTube.