Did you see the video or is this a lucky coincidence? I refer to the video uploaded today: “I Used Proton Mail for 6 Months - Is it Good?” (18:37 min.) by The Linux Cast, watch on YouTube or Invidious on Dec 10, 2024
He explains a bit his experience and talks about switching from Gmail to Proton Mail. So you might be interested into watching.
I think the streaming with Xbox Cloud Gaming does not work on Firefox and requires a Chromium based or Safari browser. I believe the reason is because Firefox does not have an API for streaming games? Or the current implementation is not compatible with it. I read stuff like that in the past couple years and don’t actually know why Microsoft does not support Firefox. So that would be a thing to put on a WOS: Wall Of Shame.