Kristof Polleunis recently dropped a note to The Guru to take a look at the Gcache Plus extension. A very simple yet useful extension which allows you to “Resurrect a dead pages“. Simply put once installed the add-on uses a keyboard short cut CRTL+SHIFT+ALT+G or context (right-click) menu entry (Gcached Page) to allow you to pull up (if available) the Google cached version of the page.
Gache Plus works with Firefox 2.0 and newer and is around 12 KB.