Hello,
 
	 
 
	I wanted widivine in kodi, after some fails it found a solution.
 
	Maybe this helps you to get widevine working on arm aarch64 in web browser, too.
 
	 
 
	First I used widevine-installer (needs squashfs-tools package) from here
 
	https://github.com/AsahiLinux/widevine-installer
 
	 
 
	This should already work with chromium or firefox, didn't work in my case.
 
	I did not try further to solve web brower issue, cause I wanted to use kodi.
 
	 
 
	I installed kodi via flatpak and setup widivine with inputstream-helper plugin.
 
	And again it failed and was not working 😞
 
	 
 
	Final solution was to copy libwidevinecdm.so created by widevine-installer (/var/lib/widevine/libwidevinecdm.so) to kodi cdm folder (/home/user/.var/app/tv.kodi.Kodi/data/cdm/libwidevinecdm.so)
 
	 
 
	So should be possible to get widevine working in chrome or firefox, too !!!
 
	 
 
	Good luck !
 
	Bjoern