Firefox pet peeve

Ever see this dialog when trying to return to a search results page?

Arrrgh. This is especially irritating when it's a search results page that took a long time to load, on a slow server.

Why can't they add a "View cached version anyway" button so that you can see the page as it was before you navigated away from it? Sure, you can open new tabs from the search results page instead of just clicking the links, but by the time you see this dialog it's a bit too late to decide to do this.