It might just be me...

Okay, I'm trying Firefox and want to know what the big deal is with it. The Bookmarks system is virtually unusable as trying to organise the bookmarks is a nightmare, particularly putting in separators which seem to be placed almost at random. The order of the bookmarks and folders in the left pane bears no resemblance to the order in the right pane. When I'm browsing a site, such as a comic site, and wish to save a new page as the bookmark for the site it doesn't over-write the old one but creates a new entry which means that I either end up with multiple entries and have to delete the old ones by hand. The help file is no help at all.

Can someone please explain what I'm doing wrong or why the world thinks they can see the emperor's new clothes?