I ran into the same exact scenario. I tried to get moving with the devtools and while it looks similar and breakpoints seem to work better, getting acclimated

I ran into the same exact scenario. I tried to get moving with the devtools and while it looks similar and breakpoints seem to work better, getting acclimated was wasted time that I would rather have spent after the production issue was resolved. That being said, I can't fault Mozilla for this. I've known for some time that Firebug was on it's way out.