Hi, I'm a web developer, working on a company with 13 developer (incl. me), 13 month ago there was 4 Google Chrome guys & 9 Firefox guys. (I mean main web browser during developing & also regular use). Now there is just 1 Firefox guy (and 12 Google Chrome guys), and you guessed right, that guy is me. I'm not talking about features (both have great features & Firefox with Firebug is winner for sure), but Firefox's features is almost Useless, for example JS Profiler, yes, that works perfectly, but kill RAM & CPU. (almost same about other features & the browser itself.) Yes, you are working on e10s, but Firefox dev edition have some bugs & it's not really alternative to Firefox. I think you know this issues & you are working hard to make Firefox better than ever, but I think NOT HARD ENOUGH. You're losing your users. I really love Firefox & with Firebug this browser is un-reachable for other browsers, but needs some big changes. Conclusion, thanks that you finally decided to mix Firebug & Firefox dev console. but please don't remove Firebug's main features (I opened an issue about than on Firebug's github repository too). Thanks for reading this & good luck.