Double-click the preference to temporarily change its value from to false .
If your plugin remains broken, the issue likely stems from a permanent API block. Switching to one of these highly-rated tools will get your playlist downloads working again. Video DownloadHelper (With CoApp)
: Visit the addon's page on the Firefox Browser Add-ons website. Check the "Reviews" or "Support" tab to see if other users are reporting the same issue or if the developer has posted a workaround. Best Verified Alternative Firefox Add-ons
Ensure that the extension has explicit permission to run on youtube.com and access network requests. Reliable Alternative Firefox Add-ons youtube playlist downloader firefox plugin fix
The industry standard. It often requires a companion app for large playlists but remains the most consistent.
For long playlists (over 300 videos), YouTube sometimes has internal bugs that prevent downloaders from "seeing" the whole list. Long Playlist Fix : Install the Long Playlist Fix extension, which helps navigate the YouTube index [2]. Export Links : If the downloader fails to fetch the videos, use YouTube queue/playlist links export
Firefox usually updates extensions automatically, but developers often release emergency patches for downloaders that haven't hit your browser yet. Open (Ctrl+Shift+A). Click the gear icon and select Check for Updates . Double-click the preference to temporarily change its value
YouTube frequently updates its frontend architecture and layout code. These changes instantly break the scraper scripts that browser extensions rely on to detect video URLs.
Offers 1-click download capabilities for whole playlists.
This standalone software can "Paste Link" directly from your Firefox clipboard. It handles 100+ video playlists and automatically downloads subtitles and metadata, which most plugins cannot do. Security Warning ⚠️ Video DownloadHelper (With CoApp) : Visit the addon's
: It parses entire playlists instantly, lets you choose quality settings for the whole batch, and downloads subtitles automatically.
: Mozilla is transitioning to a new extension architecture, which changes how add-ons intercept network requests.
If your previous plugin is gone, here are the top replacements for 2026:
: Over time, corrupted cache or tracking data can interfere with extension functionality. Click the padlock icon in the Firefox address bar, select Clear cookies and site data , and reload the page.