My question is fairly simple. I have multiple microphones available to the system, shown in the first screenshot below. Most of these are physical microphone inputs, but I've also created a virtual device. I am only able to use 3 of these, consistently the same 3 devices, in Firefox - shown in the 2nd screenshot. Interestingly, one of the devices that shows in Firefox (Teams Audio Device) I cannot find anyone else on my system. https://www.onlinemictest.com/ is a good site to allow selection of the audio device, but I get the same results across all sites that use audio - google meet being the big one. I've gone through all settings menus and played with everything that I can find - resetting microphone permissions, clearing cookies. I've accessed the same site (https://www.onlinemictest.com/) in Firefox Dev Edition, and I *can* select from my full range of microphones. Interestingly, and just something I've noticed while submitting this issue, the debug info *does* include the mic devices missing from the menu! Can anybody help me look into what's keeping my list of mics in this 'frozen' state, and stop me from having to use Chrome for work meetings? Cheers!