Firefox 3D view
developer.mozilla.org
developer.mozilla.org
http://blog.mozilla.org/blog/2012/03/13/firefox-adds-new-dev...
The 3D view is not "every day" useful, but people have found it to be a quick way to spot unexpected nesting issues.
As noted elsewhere, this feature started life as an add-on made during Google Summer of Code 2011 by Victor Porof, who continues to work on Firefox developer tools today.
(in case you hadn't guessed, I work for Mozilla... usual biases therefore apply ;)
Very jealous of this as a Chrome user. :) Good job guys.
"Check out this site. Design is awesome."
"Yeah but did you view source? Terrible semantics and inline css."
2012:
"Check out this site. Design is awesome."
"Yeah but did use 3D View? The element stacking is terrible. Doesn't have those nice symmetrical pyramids you like to see."
Some people reconcile it by saying bootstrap is (as the name implies) just for getting things up and running and once your site is stable you should switch to better markup. But I don't think anyone actually does that.
Too bad they didn't put some inertia in it, it would be fun to flick around the webpage.
We're now on Firefox 14. It's reasonably old.
Not very useful, but a cool effect. Life is much better when we can host web browser instances as textures. Geometry (as in this case) would allow for even better effects; I feel bad that I never thought of that!
Check out this screenshot from cityofchicago.org, the 3D DOM looks strikingly similar to the Willis (Sears) Tower...
[edit] Looking back, it's just the "G+" feature on any page...
As an extra, clicking the mousewheel down should allow you to 'pan' (rather than 'rotate' on mouse1)...
Would make things much nicer...
still, pretty cool