Another item from the search engine grab-bag – “Can’t delete corrupt Firefox 3 bookmarks”.
Yes, of course you can. The same way as you do in any other browser. In the Bookmarks (Favorites in IE)sidebar, right-click the bookmark, click Delete – it’s gone.
I mean, come on – it couldn’t be any simpler.
And if you’re having trouble with FF3’s Organise Bookmarks function – which sucks – this is the solution.