Removing Bookmark 'Star'
Removes the Bookmark 'Star' button added to the Firefox 3 address bar

---

Tweak Type:	Display
Fx 2:	NO
Fx 3:	YES
Fx 3.5:	YES

As if the ‘Go’ Button weren’t bad enough, Firefox 3 adds a Bookmark ‘Star’ Button to the address bar.

This ‘feature’ allows you to bookmark the current page you are browsing. This can also be accomplished by pressing CTRL+D (Add Bookmark), selecting Bookmark This Page from either the Bookmarks or Context (right-click) menu. To remove the Bookmark ‘Star’ Button use ChromEdit and add the following lines to your userChrome.css file:

/* Remove the Bookmark star */
#star-button {
display: none !important; }

Once you have added these lines, click Save, then Restart; the ‘Star’ will be gone when Firefox restarts.

Source