Release v5.5.0 · puemos/hls-downloader

Highlights

Large downloads now use a disk-backed processing and muxing pipeline on Firefox MV2 and Chromium MV3, keeping memory usage from growing with the complete media size and producing normal seekable MP4 or MKV files.
A new output-format setting lets new downloads use MP4 or MKV. Downloads containing subtitles continue to use MKV automatically.
The popup has been polished across Capture, Playlist, Downloads, Settings, storage, status, and detail workflows.
Dependency security maintenance now includes a repeatable audit and compatibility-patch verification gate.

Requires Firefox 128 or newer or Chromium 111 or newer.
Existing settings are preserved; MP4 is used when the new output-format setting is absent.
Downloads started by an older extension version remain readable through the legacy finalization path but are not migrated. If legacy finalization runs out of memory, delete the job and download it again.
No new extension permissions are introduced.

Security audit and compatibility-patch verification passed. At tag time, GitHub reported no open Dependabot or code-scanning alerts.
Typechecking and all 272 unit, integration, and component tests passed.
All blocklist and no-blocklist MV2/MV3 variants built successfully.
Firefox package lint completed with 0 errors and 6 warnings.
The Chromium MV3 browser E2E completed an HLS download as Matroska with no runtime exceptions.
All six release archives passed integrity, version, minimum-browser, permissions, CSP, and variant-name inspection.
Representative popup stories passed visual, overflow, interaction, and dark-theme checks at a 520×700 viewport.
Firefox MV2 installed successfully as a temporary add-on in a fresh headless profile. An interactive Firefox download could not be automated in the release environment.