I was a long time Firefox user, but moved to Chrome when Firefox started to feel bloated. With the release of Firefox 4, I’ve gone back to using Firefox as my primary browser (although I still use Chrome quite a bit, too). When I’m using Firefox, one feature that I miss from Chrome is the Omnibar, Chrome’s combined location box and search box. Firefox’s Awesome Bar has some nice features of its own, but if space is at a premium on your machine, you can get Chrome-like Omnibar goodness with the Omnibar extension for Firefox.
The Omnibar extension was a tool that I actively hunted down, knowing that there HAD to be a Firefox extension that combined the two toolbar boxes. The extension does just that, plus a bit more. It will show you search and url suggestions as you type. You can also change search engines on the fly, using keywords. For example, typing “keepass vs. lastpass @y” (without quotes) will perform the “keepass vs. lastpass” search in Yahoo. Thanks to the Omnibar extension, I’ve been able to save some serious screen real estate on my Air, getting all the various toolbars squeezed into two rows.
How have you hacked your Firefox installation, whether to get more space or to get some other awesomeness?