I use firefox because it has the most hassle-free hardware decoding in linux. However, everything basically feels better with Brave, even with the same amount of plug-ins.
I don't have an Ubuntu VM at-hand but on Debian bookworm it installed fine, and (after tweaking one line in profiles.ini to point to my old ESR profile) it loaded and played Widevine-protected videos without any issues.
[1]: https://support.mozilla.org/en-US/kb/install-firefox-linux#w...