← Back to YT Downloader for Firefox
What this does
A Firefox add-on that saves a YouTube video to your computer: the video as an MP4 file, just the sound as an MP3, or the captions as an SRT file. Any mix of the three in one go.
Everything happens inside Firefox on your own computer. There is no website in the middle doing the work, so nothing is uploaded and there is no queue.
Installing it
- Open youtubedownloader.dirtsimple.app in Firefox and click Add to Firefox.
- Firefox says it prevented the site from asking you to install software. That is normal for add-ons that are not in Mozilla's store. Click Continue to Installation.
- Click Add. The add-on is signed by Mozilla and updates itself from then on.
- Optional: click the puzzle-piece icon in the toolbar and pin YT Downloader so its button is always visible.
Downloading a video
- Open the video on YouTube.
- Click the YT Downloader button. A new tab opens with the link and file name already filled in.
- Tick Video, Audio and/or Transcript.
- Click Download. Files go to your normal Firefox downloads folder; Open Folder takes you there.
Quality settings
Open the Quality section on the download page. Your choices are remembered.
- Max video quality: 1080p is the default and works for almost everything. 1440p and 4K files are several times bigger, and very long videos at those sizes can run out of memory.
- MP3 quality: Best available is right for most people. Lower numbers make smaller files.
Your privacy
The add-on talks to YouTube directly from your computer and saves files to your own downloads folder. Nothing about what you download is sent to us, and there is no account. This site only hosts the add-on file and records your name and email when you first sign up.
Common questions
Does it work in Chrome or Edge?
Not yet. It is Firefox only for now.
A download failed. What now?
Try again once; YouTube sometimes refuses a single request. If it keeps failing for every video, YouTube has changed something and the add-on needs an update, which arrives automatically once it is fixed.
It says no transcripts were found.
The video has no captions. Some uploaders turn them off, and very new videos may not have automatic ones yet.
Can I download private or members-only videos?
No. Only public and unlisted videos.
Is this allowed?
Only download videos you have the right to save: your own, or ones the owner permits.