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When I try to launch a movie from Netflix I get an screen with an error code F7701-1003. Other browsers I have do not have this problem and play the vifdeo normally.

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If you can find out what causes this error code to appear, we would be on the road to solving the problem. BTW, it can play videos on the selection screen but only raises the error when i try to launch the movie. I also have difficulty with News videos where the wait symbol never stops, it just keeps trying to play it and never succeeds.

If you can find out what causes this error code to appear, we would be on the road to solving the problem. BTW, it can play videos on the selection screen but only raises the error when i try to launch the movie. I also have difficulty with News videos where the wait symbol never stops, it just keeps trying to play it and never succeeds.

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Do you have DRM enabled in Settings? Is there Widevine Content Decryption Module library in about:plugins?

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Make sure you have updated the Widevine plugin to the latest version (4.10.2557.0).

  • Tools -> Add-ons -> Plugins

You can toggle DRM off/on to see if that makes Firefox (re)load DRM components.

You can possibly check the XHR requests in the Browser Console if this doesn't work.

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Why am I expected to figure out what's wrong in Firefox browser when Google, which I detest, works just fine?