This is an update of a browser extension I last wrote about a couple years back. It's too good not to revisit every so often.
Just the other day, this happened: After writing a fairly lengthy post in a browser-based blog tool, I hit the Backspace key to delete something--but because my cursor wasn't inside the text field at the time, Chrome interpreted that as the keyboard shortcut for "back." In other words, back to the previous page. A big chunk of my unsaved work: gone.
This kind of thing can happen in all kinds of circumstances. Maybe you click Next or Save after completing a Web form, and your browser crashes, or the server times out, or your Internet connection croaks. Whatever the case, it means you just wasted a bunch of time and lost a bunch of work.