Comment 3 for bug 1065167

The bookmarks menu as well as the history menu don't show / have mnemonics for the items in the menu. The only way to access items in these menus is by using the cursor keys (or the mouse :( )

The other menus (file, edit, view, tools and help) do have the mnemonics for the items

Example
<alt>F brings up the file menu; mnemonic V gives print preview
<alt>B brings up the bookmark menu; no option to go to an item by using a mnemonic

This has been requested in Ubuntu : https://bugs.launchpad.net/ubuntu/+source/firefox/+bug/1065167