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[Fixed maybe?] YouTube hasn't worked in Firefox for me for weeks (self.firefox)

submitted 10 months ago* (last edited 10 months ago) by CrayonRosary to c/firefox

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EDIT: It's something to do with my VPN and/or EasyTether, but it only happens in Firefox, so I didn't think that could be it. I commented about my findings below: https://lemmy.world/comment/7585497

I start a video and it either doesn't load at all of stalls within 5 seconds, never to recover.

I've tried everything:

Deleting every Mozilla folder in AppData to completely refresh Firefox. (after backing up my profile)
Flushing DNS cache
Uninstalling and reinstalling Firefox. (Which made me remember I had a policies.json file in the program folder to permanently lockdown the settings I want. So that wasn't the problem either.)

Even when using no extensions like an ad blockers it still won't play videos. Besides, I'm a Premium subscriber. Once in a while a video will work, but it's so, so rare. And often it'll even stop after a minute.

Meanwhile, it'll work in the DuckDuckGo Browser all the time, which is Chromium based.

What do you think the deal is? It broke rather suddenly a few weeks ago. Do you think it's Mozilla's fault, or Google's?

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[–] [email protected] 4 points 10 months ago (1 children)

Try looking in the network panel to see if any resources are failing to load? Any chance FF sync is installing extensions that are interfering?

[–] CrayonRosary 2 points 10 months ago

Thank you for reminding me of that. Yes, I'm getting a bunch of NS_BINDING_ABORTED errors on about 1/3 to 1/2 of the requests to googlevideo.com.

From what I can tell, it's an error you get when a javascript binding is deleted because you navigated away from a page before the event finished. This happens continuously, and the duration of these requests is 0 ms. Seems like it's related to DASH video and how a lot of little requests are used to download small segments of video.

I've done some experimenting, and I think it's the fault of my VPN and how I get internet on my PC. I use EasyTether to get internet through my phone without paying for tethering, and Mullvad VPN. I use the VPN on my phone, so that my carrier doesn't see my PC traffic nor my phone traffic.

Ironically, YouTube works if I use the VPN on my PC instead, or if I run it on both! No idea why it's acting strangely, and why it only causes issues in Firefox.