deleting bookmars in firefox

[Linux for blind general discussion]

Greetings!

Does anybody know the keystrokes, if any, for deleting firefox 
bookmarks?  Neither firefox help nor Google searches have helped. 
Somebody gave me a series of keystrokes a few years ago, but I've lost 
that info.  (I recall that it was more complicated to do the job than it 
should have been, but I think it worked.)

Thanks for any help.

Al