In not very long ago launched a new version of Mozilla Firefox. The new Firefox v.7.0.1 it doesn't come with visible improvements compared to the previous version, I would even say that it "moves" a bit harder. In addition, he managed to "impress" me with a error (NetworkPrioritizer.jsm: 175) And a series of add-on sites (Firefox Addwe) Detected incompatible for the new version.
Basically just try to v.7.0.1 correction of errors occurring with the previous version, but from what it seems longer working.
A good thing that they did is adding the feedback option to collect information on the use of memory, performance and incopatibilitate with web pages.
Download Firefox v.7.0.1 - mozilla.org
Stealth Settings - Download / Update Firefox v.7.0.1.