Once I realized this the magic was gone and Chrome held zero appeal to me. Luckily that was right around when the improved JIT in FF4 started getting usable with Conkeror, (http://conkeror.org) so I was able to switch back to the Moz without a noticeable speed hit. And what an amazing difference in flexibility... I don't know what I was thinking.
This is not so much about Firefox itself; as an application it's pretty meh, but as a platform it's excellent. It's the only thing I've ever seen that comes close to Emacs in terms of hackability.
I use almost no plugins/extensions on any of the browsers, found they just slowed down the browser too much.
So: less passion, yes. Lost interest previously but we've made up.
Firefox on the Mac is brutally slow at times for me and the interface doesn't look nearly as nice as Chrome. I like software that gets outta my way and lets me work effectively. The developer tools in Chrome are way better than Firebug IMO anyway so no hangup for me there.
Chrome feels a little lighter/faster, and I also like that themes don't take over the entire browser. A lot of nice FireFox themes absolutely destroy readability in certain places like the page title, and FireFox's chrome by default doesn't look as nice as Chrome's.
For what it's worth, I'd love to give Opera a fair chance again, but it doesn't play nicely with inertial scrolling on Mac.
Then I switched to Canary, and realized that it was fixed.
Then looked back at the form:
Builds: 13.0.772.0 dev 13.0.775.0 canary
It's a great day for browsers.
Firefox 4 has been out for a while and it seems to be just as good as Chrome in most aspects, so I would recommend you use whichever one you prefer.
As people have said about Firefox's hackability, I don't think there will be a Chrome extension as good as Pentadactyl.
The only thing really keeping me is firbug.