how do I delete a bookmark from macbook pro?

Depends on which browser are you using

see

http://mozilla.gunnars.net/firefox_bookmarks_tutorial.html

or

http://www.wikihow.com/Delete-a-Bookmark-in-Mozilla-Firefox

Sorry I think I have shown you Firefox on windows

on a Mac

Use the "Bookmarks" menu. The first item is "Show All Bookmarks" select this. The Library window pops up, click on Bookmarks Menu This should show all bookmark folders and bookmarks not in folders. Then highlight the bookmark you want to remove and hit the delete key

open firefoxclick on aa bookmark (probably one you don't like)

click bookmarks, organize bookmarkss,bookmark menu,highlight the bookmark you want to get rid off, delete