[callahad]

We track most of our bugs in Bugzilla (https://bugzilla.mozilla.org). Once you've created an account, go to File a Bug, Core, and choose "Audio/Video: Playback" as the Component in the form.

(In general, it's fine to chuck bugs into Firefox -> Untriaged and they'll eventually land in the right place.)

If Bugzilla's a bit of a pain, just let me know and I'll happily file it for you.

[tmzt]

Are Quantum bugs in bugzilla or Github?

[Yoric]

Bugzilla. There are a few exceptions, but if you misfile a bug to Bugzilla, don't worry, it will be moved to Github during triage.