This Firefox extension introduces the Safari browser's SnapBack feature to Mozilla users. It comes with some helpful options beyond the base function of providing a quick way to return to an impermanent bookmark.
By letting users set an impermanent bookmark, they can carry on with their usual Web-browsing behavior, but are never more than one click away from jumping back to the page set as the SnapBack. Excellent for keeping track of main pages when participating in Web forums or other sites where it's easy to lose track of an important page as your drill through the content, SnapBack for Firefox is simple and effective. A toolbar icon makes using the feature easy to get to, but there's also a customizable hot-key command option for those who don't like to take their paws off their keyboards, and you can add SnapBack's option to your context menu.
Beyond setting the SnapBack page and the SnapBack action, the plug-in also has a Clear function for wiping the SnapBack page from memory. Unfortunately, the only way to access the options menu to change the hot keys is through the main Add-Ons menu. This minor drawback shouldn't keep you from trying this snappy way to return from whence you came.