Alexander Limi has posted a video, from the Design Lunch three weeks ago, wherein the UX leads answered questions about their provisional redesign of the Firefox UI.
Alex wants to warn you that the contents of this video are very rough, very much a work-in-progress, and very much liable to change. You shouldn’t watch it thinking "this is how the next version of Firefox is definitely going to be". You should think of it as a behind-the-scenes look at "how the sausage gets made", in Alex’s words. He also warns:
There’s swearing, there’s mumbling, there’s ranting, there’s hand-waving, there’s political incorrectness.
I’m also in the video, playing MC in my overalls.
Today we recorded Part 2, which goes into detail about the notifications interface and the downloads manager; it should be posted fairly soon.