Files v0.1.9

Music (new extension, experimental)

A Music tab and a MUSIC entry in the sidebar.

• Your library: the audio files in your music folders (Settings →
  Extensions → Music), with tags, covers, search and a queue. Right-click
  an audio file → Play in Music (its folder becomes the queue) or Add to
  Queue.
• Spotify: sign in in the browser; Liked Songs, playlists, search.
  The music plays in the Spotify app (Premium) and Files controls it, as
  Spotify requires.
• Yandex Music (unofficial API): sign in with a token; «Мне нравится»,
  playlists, search, and «Моя волна», the personal radio that plays
  endlessly and learns from plays and skips. Tracks play in Files.
• Right-click a track: Play Next, Add to Queue, Show in Files; for
  Spotify and Yandex Music also Like, Remove from Liked, Add to Playlist,
  Go to Artist and Artist Radio; Yandex Music also Dislike and Download
  (an MP3 with tags, into Downloads). Spotify offers the artist's top
  tracks instead of radio, which it closed to apps.
• Sound: volume and a 10-band equalizer with presets (Rock, Pop,
  Classical…), kept for every track and for previews.
• Media keys: the keyboard's play/next keys, headphone buttons and the
  system's Now Playing (macOS Control Center, the Windows media flyout,
  MPRIS on Linux) control Music, with the title and cover.
• The THIS COMPUTER, SPOTIFY and YANDEX MUSIC groups fold and unfold.

Previews

• Quick Look (Space) on a song plays it, with its cover and tags.

Search

• music: in global search (⌘K) finds tracks in the library, Spotify and
  Yandex Music, and plays the one you pick.
• ext: and kind: match the start of a name: ext:web finds .webp
  and .webm, kind:vid finds videos.

Tabs

• Drag a tab to move it (pinned tabs stay in front).
• The tab menu shows its shortcuts: Close ⌘W, Close Other Tabs ⌥⌘W; the
  rest can be set in Settings → Hotkeys. Its items can be colored in
  Settings → Appearance.

Fixes

• Memory: lists and grids show small copies of pictures instead of
  decoding every photo full size, and a folder's pictures are freed when
  you leave it. Long sessions in photo folders no longer grow to gigabytes.
• Opening a file from search scrolls to it, also in folders with hundreds
  of items.
• The Music track list stays smooth with thousands of tracks, and rows
  span the whole list.

Installing: the builds are not signed by Apple or Microsoft yet.
macOS: open it once, then System Settings → Privacy & Security → Open Anyway.
Windows: SmartScreen → More info → Run anyway.
Linux: chmod +x the AppImage.