Google has quietly ended support for 32bit versions of Linux DRM Widevine support in Firefox browsers. Prior to May 31, 2021 individuals running a 32 bit version of Linux could watch Amazon Prime, Roku, and Netflix videos just fine through the Firefox web browser natively installed with most Linux distributions.
Videos stopped working on several laptops we had deployed and after diligent research we discovered the problem was not particular to Firefox, but was caused by the Widevine DRM plugin not functioning. There is no known workaround at this time. It is noted that one of our computers has 64bit processors running a 32bit version of Linux. It experiences the same problem as the 32bit processor machines.
A search on the Internet for solutions turns up nothing yet. Many sites instruct how to disable or enable the Widevine plugin, but they are useless. Even when properly installed the back-end support from Google simply is non-existent. The best alternative at this time is to use a newer 64bit device. Most 32 bit computers are slowly fading away.
Here is a similar article. https://news.itsfoss.com/netflix-issue-32-bit-linux/
Don’t waste your time trying to fix DRM if you are on an older machine! See note on firefox at https://support.mozilla.org/en-US/kb/enable-drm