Π Firefox, on the basis of which the release of Firefox 2 will be formed on December 71, new look for the address bar. The most notable change is moving away from displaying the list of recommendations in full screen width in favor of transforming the address bar into a clearly defined window. Added "browser.urlbar.megabar" option to about:config to disable the new appearance of the address bar.
Megabar continues to develop a new implementation of the Quantum Bar address bar (browser.urlbar.quantumbar), which appeared in and characterized by a complete rewrite of the code with the replacement of XUL / XBL with a standard Web API. At the first stage, the design of Quantum Bar completely repeated the old address bar and the changes were limited only to internal processing. Now for implementation ideas for modernizing the appearance.
Source: opennet.ru