We're getting into the scary space now where it's becoming feasible for sites to insist on Chrome and drop support for other browsers. I've hit two such apps in the last month where not only did the app not work on FireFox, but the experience was completely broken (blank page, etc). So they aren't even bothering with enough testing to put up a "please use chrome" message.
I use FireFox for everything personal and Chrome for development. I'd encourage others to do the same. Apart from expressing a "vote" for web standards and interoperability, it also ensures that by default you are separating personal from work / dev which makes things a lot easier when you want to nuke all your browser settings / cache / cookies etc.