Alternative take: [dev]tools are only as powerful as how well you know them. I'd like to think both firefox devtools and chrome devtools as highly capable, but you'll get way more out of the one you're used to, whichever it is.
The two devtools purport to do almost the exact same things, with a practically identical interface. The details are where the usability differences lie, such as chrome's vastly superior formatting/debugging story. I only moved to Chrome after working with firebug (!) for years and then working with firefox's builtin devtools. If anything, I should hate Chrome's devtools the most because I know them least well.
