Can't watch netflix, I get error M7121-1331 [SOLVED]

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illegalwombat
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Can't watch netflix, I get error M7121-1331 [SOLVED]

Post by illegalwombat »

I did some googling and it turns out all I have to do is enable DRM on firefox.
Great, let's do that. Aaaaand still doesn't work.

I don't know if some of my addons might cause problems, I tried to disabling them for netflix, but it didn't seem to help, I'll leave the addon list here though, just in case, including the ones that I believe would have absolutely nothing to do with the situation:

https://addons.mozilla.org/en-US/firefo ... ntraleyes/
https://addons.mozilla.org/en-US/firefo ... r-firefox/
https://addons.mozilla.org/en-US/firefox/addon/foxytab/
https://addons.mozilla.org/en-US/firefo ... asemonkey/
https://addons.mozilla.org/en-US/firefo ... verywhere/
https://addons.mozilla.org/en-US/firefo ... ent-suite/
https://addons.mozilla.org/en-US/firefo ... ab-groups/
https://addons.mozilla.org/en-US/firefo ... ck-origin/
https://addons.mozilla.org/en-US/firefo ... aswitcher/
https://addons.mozilla.org/en-US/firefo ... -same-tab/

Things I tried to do:
Disable addons on netflix
Checking that in the config page "media.mediasource.enabled" was set to true
Enabled DRM media

Now, I know using chrome might solve the issue, I've read so, but I'm sure I can make it work on firefox as well, if anyone could help I'd appreciate it deeply.





Solved this, I didn't appropriately disable user agent switcher. I told it to override for that website without telling it how to behave on it.
I'm leaving the thread open just in case someone finds themselves in the same situation.
Last edited by LockBot on Wed Dec 28, 2022 7:16 am, edited 1 time in total.
Reason: Topic automatically closed 6 months after creation. New replies are no longer allowed.
gittiest personITW
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Re: Can't watch netflix, I get error M7121-1331 [SOLVED]

Post by gittiest personITW »

Just to add to the OP - that I've spent a bit of time with a new Netflix account using Firefox/Chromium/Brave/Vivaldi - all giving exactly the same error.

Just concentrating on Firefox as that seems to the more preferred (by Netflix) browser out of that list -
Took it out of Firejail,
Disabled all security plugins and also
went into settings/plugins and there was a setting with Widevine updater default setting was to not update. Switched that on and Firefox works now.

So, just have that desktop icon just for Netflix now. When can be bothered, will try each plugin and see if can break it again.
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