Sphere works in Firefox
Sphere back end and front end should work in the Firefox browser
We will be focusing on IE and Chrome because they represent Sphere legacy (IE), and because Chrome is an option for MAC users (yeah!) and has shown significant increasingly dominating in the browser market. We’ll keep our eye on Firefox but will be delaying official support so that we can build other cool features in Sphere.
Angi Roberts commented
There is a plug in for Firefox called IElite but it only works with certain versions of windows/mac, so users have to upload older versions of the plugin to make it work. It's not very elegant and still is not perfect, but it works. We have a TON of mac users who are members and this inablity to use Firefox is the #1 complaint I receive (nearly every week and often multiple times every week). It also limits our volunteers' capabilities since many of them are also on mac or on windows but prefer firefox over the unstable IE. My IE crashes on Sphere at least ten times a day every day because of having to use the older verions on Sphere. I just have become accustomed to it, but it is a huge waste of time, restarting IE all the time.
I just installed Firefox 12.0. I can do most of my CMS/Forms/etc tasks in Firefox, but did not have any success building our emails and enewsletters. It seems that the CMS for there will not allow me to enter anything in the content area. No errors, just no response at all.