There will be a fifth beta and it is expected quite soon. Probably by March’s end.
At this stage, not much is left: more retouches to the themes (like rounded caps for the location bar on Windows), Places, and several other areas, some of them already available in the latest nightlies that followed Beta 4 freeze.
According to the latest meeting minutes, the revamped location bar’s autocomplete font size and colors could be reviewed to address some common complaints about it being too obtrusive. In the meantime you can use this tip to customize the font colors and sizes.
Some advanced search options may be added to the location bar to search only bookmarks, history or tags using a special character or force exact matches with double quotes (“).
Having your favorite add-ons ready for Firefox 3 is something that makes nervous many Firefox user. So far a significant amount of add-ons has been updated and Mozilla is giving out exclusive Firefox 3 add-ons T-shirts to developers who do it soon soon. A Firefox 3 add-ons contest is expected to be announced soon too.
Updated:Â Duplicated tabs and moved across windows keep the original history. Thanks eyaler for the catch!