What about Chrome's dev tools do you find preferable? I tend to find myself hampered by lack of functionality like easy replay of network requests, and don't spend a lot of time in Chrome's toolset for such reasons - I'd be interested to hear a different perspective.

At least for my case, I found that Firefox debugger would sometime hang for a bit. It was slowing me down. I'll definitely give it a shot on my next JavaScript heavy project.

I had the same trouble with complex applications in Firefox 45, but haven't encountered it since then - 51 and since have been much more performant in general, and that goes for devtools as well. (I suspect it may have something to do with https://wiki.mozilla.org/Electrolysis/Release_Criteria/Jank#... - but that's just a guess.)

In my case doing a "refresh" did help: https://support.mozilla.org/en-US/kb/refresh-firefox-reset-a...

I've been using e10s for quite a while now. Yes, its great that they have reduced memory consumption by a huge margin. Unfortunately, I still feel page load times, scrolling, overall snappi-ness of chrome (I use ungoogled chromium) or overall browsing experience are way better than Firefox.