Fitting in Ubuntu

Beryl with these settings in ~/.beryl/settings and this Emerald theme, plus a single Gnome panel at the bottom of the screen with the Ubuntu menu at the far left, gives these actions in four corners of the screen:

Double-clicking the title bar maximises a window.

Big back button for Firefox:

@namespace url(;
/* Fitts' Back Button - bigger target on the icon-only toolbar */
toolbar[mode="icons"] > #back-button .toolbarbutton-icon {
  margin-left: 10px !important; 
  margin-right: 10px !important;
toolbar[mode="icons"] > #forward-button[disabled="true"] {
   display: none !important;