Tubi Firefox Downloader is a Firefox extension for downloading DRM-free Tubi video streams directly through Firefox. The extension can detect HLS streams from Tubi, automatically select the best available video quality, detect separate audio tracks, and combine compatible video and audio streams into a single playable file. It also includes a built-in Season Downloader, allowing complete TV seasons to be downloaded automatically instead of downloading episodes one by one.

Download individual Tubi episodes
Download complete TV seasons automatically
Automatic episode detection
Automatic highest-quality selection
HLS stream detection
Support for separate video and audio tracks
Automatic video + audio muxing
fMP4 / CMAF support
MPEG-TS support
EXT-X-MAP support
EXT-X-BYTERANGE support
Automatic English audio-track detection
Episode download queue
Download progress display
Pause after current episode
Skip current episode
Cancel season download
Automatically organized download folders
Open Download Folder button
Downloads are performed through Firefox's network session
No yt-dlp installation required
No external downloader required
No transcoding for compatible streams

Season downloads are automatically organized like this: Downloads/Tubi/Series Name/Season 01/S01E01 - Episode Name.mp4 This extension is intended for compatible, unencrypted streams. It does not decrypt, bypass, remove, or circumvent DRM or encrypted video protection. If an unsupported protected stream is detected, the extension will not attempt to decrypt it.

Download and extract the extension.
Open Firefox.
Go to:

about:debugging

Select This Firefox.
Click Load Temporary Add-on...
Select manifest.json.
Open a Tubi video or TV series.
Click the Tubi Downloader extension icon.

For individual episodes, analyze the detected HLS stream and start the download. For complete seasons, use Season Downloader, select the season, and click Download Season.