No bios update, but you most likely received both microcode updates (which is what will fix/mitigate the Intel issue, the bios is only to ensure everybody gets the microcode update) and firmware updates (from linux-firmware)

Of course non-mainlined (i.e. not in the linux kernel) firmware is a bit more iffy, luckily it’s getting slowly better with OEMs using fwupd for those scenarios

I’ve used: User Agent Switcher

Successfully using;

1. Whitelist mode
2. Domain = teams.microsoft.com
3. UserAgentString = Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/118.0.0.0 Safari/537.36

They support meetings in Firefox so it’s a bit weird why they would block calls… They’re effectively the same thing

Additionally, if you change your userAgent to be Chrome things are working pretty good in Firefox as far as I’ve tried it (not too extensively)