They are working on startup speed, UI responsiveness, reducing I/O, a new uncluttered theme, redesign of the addon manager, resource packages (to speed up page rendering), and asynchronous calls to the Places database (which powers bookmarks, history, and the location bar).
They're not ignoring the problems, although we'd all like to see the results sooner rather than later.
Comments
Mozilla has active projects working on almost all of the complaints mentioned here: https://wiki.mozilla.org/Firefox/Projects
They are working on startup speed, UI responsiveness, reducing I/O, a new uncluttered theme, redesign of the addon manager, resource packages (to speed up page rendering), and asynchronous calls to the Places database (which powers bookmarks, history, and the location bar).
They're not ignoring the problems, although we'd all like to see the results sooner rather than later.