Ublock Origin Stopped Working with Youtube
Posted2 months agoActive2 months ago
Techstory
heatednegative
Debate
40/100
Ublock OriginYoutubeFirefoxAdblockers
Key topics
Ublock Origin
Youtube
Firefox
Adblockers
All video links and play results in: `Uncaught TypeError: can't access property "length", args is undefined` if you are on Firefox and have ublock origin turned on.
So the game begins again.
uBlock Origin users on Firefox report a sudden breakage with YouTube, sparking frustration and discussion about potential causes and workarounds.
Snapshot generated from the HN discussion
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- 01Story posted
Nov 3, 2025 at 11:38 AM EST
2 months ago
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Nov 3, 2025 at 11:55 AM EST
16m after posting
Step 02 - 03Peak activity
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Nov 4, 2025 at 1:58 AM EST
2 months ago
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Discussion (9 comments)
Showing 9 comments
jvergeldedios
2 months ago
1 replyYep also happening to me on Firefox w/ uBlock Origin turned on.
AperockyAuthor
2 months ago
2 repliesLooks like a manual delete/reinstall of ublock fixed it.
jvergeldedios
2 months ago
Hey that worked, thanks!
Aco-
2 months ago
yep, that fixed it -- thx
brazukadev
2 months ago
Floorp (Firefox-based) also stopped working. Great, time to stop watching youtube.
mc_
2 months ago
Happening with AdNauseum enabled too: https://github.com/dhowe/AdNauseam/issues/2692
fibheark
2 months ago
Disabling "uBlock filters – Quick fixes" works without any ads playing. It's unclear about if this re-enables YouTube trackers.
AperockyAuthor
2 months ago
This seems to be restricted to firefox.
drdo
2 months ago
I had the same issue but updating uBlock fixed it.
View full discussion on Hacker News
ID: 45800999Type: storyLast synced: 11/20/2025, 2:21:16 PM
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