The first update to Firefox 9 just came out and Mozilla is already developing version 11 of its browser. There are a lot of news about it, but curiously very few that will impact non web developers.
One of the biggest changes introduced is the support for SPDY (turned off by default), a protocol developed by Google to eventually replace HTTP. With it, connections always run on top of SSL, servers experience a load reduction and high latency users get improvements over page loading times.
If you're a web developer, you'll most certainly enjoy the battery API introduced in Firefox 11, which provides web developers with information about the device’s battery status; the new free-form style sheet editing; and 3D views of web page structures.
As a major version, Firefox 11 has a lot more changes. You can check them at Mozilla Hacks
