Firefox links issue

[Technoguy]

well as the topic goes my FF tab is filled with some unwanted links like rapidshare links of ebooks and some useful links which i use daily.i know if ya don't use that link for 1 day in FF it gets auto removed but isn't there some reg hack by which u can remove typed URL's like u can do for IE.all i mean by this is 2 remove some selected URL's rather than every link.