Hi

What is the version number if Firefox that you gave installed? If it is not the latest version, I recommend that you update your copy

its version 78. up to date

Unfortunately, Widevine CDM 4.10.2209.1 no longer supports macOS 10.9 and 10.10 (minimum is 10.11). See:

• https://support.mozilla.org/en-US/kb/enable-drm#firefox:mac:fx78

Note: The current version of Google Widevine is no longer compatible with older macOS versions such as OS X 10.9 and 10.10. Only macOS versions 10.11 and above are supported.

• /questions/1337047 Viewing video with/without widevine for macOS
• /questions/1333906 widevinecdm error on mozilla firefox

You may have to disable GMP update to prevent re-installing Widevine CDM 4.10.2209.1 by setting the update pref to an empty string.

• about:config => media.gmp-manager.url (leave empty)

Hi

I have been speaking to our developers and if you update to 78.1 (ESR), you should find that this issue is resolved.

@ Seburo

Did you mention that this user is on Mac OS X 10.9 ?

As you can read in my above post, Mac OS X is no longer supported by Widevine CDM 4.10.2209.1 and I'm afraid that this is also the case for 32-bit Linux as I'm not seeing an update to this latest Widevine version.

thank you. appreciate your time.

This is suddenly happening to me on Firefox 92.0 (64-bit) running on Windows 10 21H1. Worked on 9/12, failed consistently starting 9/13, (possibly coinciding with auto-update from FF 91.0.2 to FF 92.0). I'm using WidevineCDM version 4.10.2209.1 to watch Xfinity stream recordings. Have submitted 3 crash reports via FF.