Wow, so Firefox's Preferences panel is being redesigned, or is this a "Developer Edition" thing? I like it - hopefully they'll also add searching capabilities. Yes, like in Chrome, that was a good design choice.
On the theme, I personally don't like dark themes for my browser. But I like that this theme is space efficient, so I hope to see an equivalent for the stable Firefox, as I for one would use it, but please make it light instead of dark :)
I do hope to see Electrolysis get some love. It's available in Nightly, but not in this developer preview. From what I understand, the next version (36) is the first version in which Electrolysis starts being moved between channels.
The preference panel redesign has been a long time coming (years, it feels like), and yes it does look fantastic compared to the prior tabbed popup window.
Also, you can get a light version of the same compact theme by opening the devtools (Ctrl+Shift+I), clicking the gear in the upper-right, and selecting the "Light theme" radio button. It looks great!
On the theme, I personally don't like dark themes for my browser. But I like that this theme is space efficient, so I hope to see an equivalent for the stable Firefox, as I for one would use it, but please make it light instead of dark :)
I do hope to see Electrolysis get some love. It's available in Nightly, but not in this developer preview. From what I understand, the next version (36) is the first version in which Electrolysis starts being moved between channels.
Anyway, great job.