Avoid losing the page you’re on when pressing the backspace key

DisableBackspaceNavigation is a small extension for the Firefox web browser. The extension removes the back navigation function from the backspace key.

This funcationality will come in handy if you find yourself filling out a lot of online forms or posting to your blog on a regular basis and every now and again you hit backspace to correct an error and find that the browser jump to the previous page and loses everything you had already done.