How to Fix Netflix Error Code F7121-3078 on Firefox

In this guide, we will show you various methods to fix the Netflix Error F7121-3078 on Firefox. When it comes to privacy-centric browsers, then there are no brownie points in guessing that the offering from Mozilla is right there at the top. Its enhanced tracking protection in the form of three security levels gives users complete authority as to the grade of privacy that they are willing to opt for. While it’s working well and good in that domain, it seems to be having a tough time when streaming content.

Various users have voiced their concern that they are unable to stream Netflix, Hostar, Amazon Prime Video, among others in the Firefox browser. While Netflix spells out the Error Code F7121-3078, YouTube TV displays that ‘Sorry, there was an error licensing this video’. Joining the dots, and one thing stood clear- the streaming services that are DRM protected are the ones facing this error. In this regard, users are getting an error message to upgrade the browser to the latest build.

However, the rephrasing of the sentence could have been done a little bit better. This is because the issue isn’t with the outdated browser build, but with an older version of the Digital rights management certificate, So updating the browser will have no effect whatsoever on this error. Rather, you will have to manually update the certification. Upon doing so, it should fix the Netflix Error F7121-3078 on Firefox. Along the same lines, the issues with Hotstart, Amazon, YouTube, and the likes would also be rectified. So with that said, let’s get started.

How to Fix Netflix Error Code F7121-3078 on Firefox

Firefox uses the Widevine plugin in order to stream the DRM-protected contents. And the browser usually updates this plugin on its own at regular intervals. However, it seems that has happened for a considerable time period. Therefore, you should consider manually updating the DRM certificate plugin, using any of the two methods listed below.

FIX 1: Manually Update Widevine DRM

1. Launch Firefox and copy-paste the below location in the address bar:

   about:addons

2. Then select Plugin from the left menu bar.
3. After that, expand the section titled “WideVine Content Decryption module provided by Google”.
   
4. Then click on the Settings icon situated at the top right and select Check for Update.
   
5. Firefox will check for the latest DRM update and would subsequently download and install them.
6. Once that happens, restart Firefox and then check if the Netflix Error F7121-3078 has been fixed or not.

FIX 2: Disable and Re-Enable DRM

1. Launch Firefox and copy-paste the below location in the address bar:
2. Then type in the below keyword in the search box

   about:preferences

3. It should bring up the Digital Rights Management (DRM) Contents.
   
4. Uncheck Play DRM-controlled content option and wait for around 30 seconds.
5. Firefox will uninstall the DRM module. Then re-check it and the browser shall reinstall it back.
6. Once done. restart the browser and the underlying issue should have been rectified.

So with this, we round off the guide on how you could fix the Netflix Error F7121-3078 on Firefox. Likewise, it should rectify the issue that other streaming services might be having in this browser environment.

Since it involves DRM certification, deleting the browser’s cache or data or reinstalling it wouldn’t help you out. The only way out is to update the DRM certification. And for that, we have shared two different methods. If you have any queries concerning the aforementioned steps, do let us know in the comments. We will get back to you with a solution at the earliest.

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