[gcp]

It's no longer a modal dialog. Seems like a simple GUI improvement.

[Aloisius]

On a Mac at least, the Preferences window is not modal. You can still interact with Firefox even though it is up. Is that not the case on other OSes?

[gcp]

On Windows it's modal. Dunno about the others.

[idleloops]

Not Modal on Nightly Linux.

[crazygringo]

Why does "no longer a modal dialog" = "GUI improvement"? This isn't obvious to me at all...

[gcp]

Because just looking at the preferences blocks everything else in Firefox? Given how important a browser is, this is quite annoying.

A trivial example is opening up preferences and then wanting to Google to figure out how to configure something. Not possible in the current design.