[Nawid3333]

Found while testing the upstream reports you listed: #456's video, vimeo.com/863362136, is copy-protected now. FastStream took it over and gave a player that sat at readyState 0 behind "This video is copy-protected (DRM)…". Vimeo's own player plays it.

What happens now

• No player opens when the video FastStream would play is copy-protected. The page keeps its own player.
• The toolbar button shows "DRM", and its tooltip says why. It resets on the next page and at Off.
• mpv mode sends it nowhere. The refusal works like the Firefox VPN one ("!" and the reason in the tooltip). The allowlist's MPV then sends no later stream of that page either: that would be an ad's, or a piece of the film.
• Clear streams behave as before, AES-128 HLS included, which FastStream decrypts itself.

How it is told

• No new requests. The background already reads a stream's master playlist and its first variant for the length. Vimeo's master names no key. Its variant and audio playlists carry METHOD=SAMPLE-AES-CTR under a Widevine and a PlayReady key (measured live).
• One rule for the background and the player. StreamLength.hlsProtected keeps the keys in force as hls.js does. A segment plays when its identity key is one FastStream decrypts. That is Decryptable.mjs, the rule HLSFragmentRequester.takeOverDecryption now uses too. A unit test runs both on the same playlists through hls.js's own parser.
• Session keys decide nothing. EXT-X-SESSION-KEY may name a key no variant uses.
• DASH: every video adaptation set under ContentProtection. A clear one beside them plays.
• The pick, not any protected stream. The gate looks at the stream the player would pick (the longest, StreamPick.pick). Leaving protected streams out of the pick would have let a film's clear ad win it.

Measured

Case	Result
player.vimeo.com/video/863362136 (DRM), live	Vimeo's player kept, badge DRM, tooltip as written
vimeo.com/22439234 (clear), live	taken over, plays as before
vimeo.com/22439234, saved (#456)	126 MB MP4, H.264 185.87 s + AAC 185.88 s, 0 decode errors, 0 repeated packets: no loop

Tests

• Unit:
  • HLSEncryptedPlaylists: 12 playlists, the background's rule equal to the player's
  • StreamLength: DASH, the attribute parser, CRLF, session keys
  • StreamLengths: Vimeo's shape, AES-128, DASH, the URL forgotten with its length
  • backgroundDetection: no player, the ad case, a DRM trailer beside a clear film, AES-128, reset on the next page
  • backgroundMpv: the allowlist, the player's button for a stream not read yet, a clear stream
• Without the fix: the 5 DRM tests fail and the 3 clear-stream ones pass.
• Green locally: lint, tsc, all 3329 unit tests, ext specs source-length, framed-player, redirected-source and page-qualities.

Strings

extension_toggle_label_drm and player_mpv_drm in all 16 locales. glm translated them; I reworded the German.

🤖 Generated with Claude Code