Surfkeys
https://addons.mozilla.org/firefox/2282/ and Functions for Keyconfig
https://addons.mozilla.org/firefox/1537/ show what Keyconfig
https://addons.mozilla.org/firefox/1537/ can do.
You can modify any menu but not so easy doing it manually so there is Menu Editor
https://addons.mozilla.org/firefox/710/ A few extensions might give trouble but generally it works. Full control over most menus in Firefox.
Mozillazine seems to be slow right now but search for this. Not complicated but lots of details. Here are some of my entries. Kicks rightclick stuff out.
menuitem[label="Send Image..."] {display: none !important;}
menuitem[label="Send Link..."] {display: none !important;}
menuitem[label="Bookmark This Link..."] {display: none !important;}
menuitem[label="Bookmark This Page..."] {display: none !important;}
menuitem[label="Set As Desktop Background..."] {display: none !important;}
#context-stumble-tagit { display:none !important; }
#context-stumble-search { display:none !important; }
Last 2 is for Stumbleupon extension. Anything can be modified which is good since some extensions dont have tickboxes to disable/enable. Check out
www.userstyles.org for possibel useful code or perhaps Extensionsmirror
http://www.extensionsmirror.nl/ Most info is available somewhere. Not all 1.5.x.x tricks works on 2.0 I think, Im not really into this but anyone can hack a little
All this stuff goes into userchrome.css but Menu Editor works directly with localstore.rdf. Gigantic shortcut compared to notepad.
Related is Custom Buttons, I have 5-6 of them - nice effects and you only need 1 extension not 5. Also being transformed to 2.0 status and extension comes as an official and alpha version. A little messy but check it out should you get hooked on modifications. Some have quite unique features, ie. all my top menu is only seen when I hover a Firefox icon. No space wasted. I have menu for starting applications, opening folders. One starts IE with current url, other buttons for Opera etc. Another do not show searchbar but only icon and drop down list of engines, uses urlbar as search and also acts as a go button for it = less pixels, no loss in functionality. All sidebars is accumlated into 1 button. Needs polishing but definitely nice once you find useful buttons, may be 50-75 or so to pick from now.
http://custombuttons...d4f6a189e0015dd11fe8 You should read threads on each one, as said not all are 100% perfect due to 1.5.x.x vs. 2.0 vs. extension version mess.