After filling in a lengthy Web form, you click Next, and poof: your browser crashes, the server times out, your Internet connection dies--in other words, all your hard work is gone. Fortunately, there's Lazarus, a Firefox add-on that makes it easy to recover lost form data.
Here's how it works: Lazarus automatically (and securely) saves every keystroke you enter into any Web form, blog tool, comment box, or what have you. To bring back your data, just right-click and choose Recover Text or Recover Form from the context menu. At long last, this feature is now available in Firefox 3.5 in the form of Session Restore. (Now if only it were added to Internet Explorer.) Lazarus has saved my bacon several times since I first installed it. I now consider it an essential part of my Web life.
Note: This link takes you to Mozilla.org, where you can automatically install the file into your Firefox browser. This program is donationware. It is free to use, but the author accepts and encourages donations towards further development.