Same here. I still feel Firefox devtools are not innovating fast enough. Chrome workspaces and a lot of other useful features are just not present in Firefox. I feel that's one of the major reason I could never migrated to Firefox professionally.
I am also quite impressed with IE 10 & 11 devtools. It is really useful and has clean UI and UX.
In short I could say that:
Chrome Devtools > Firebug > IE devtools > Firefox devtools
In short I could say that: Chrome Devtools > Firebug > IE devtools > Firefox devtools