Visual Hashing (lkoelcpcjjehbjcchcbddggjmphfaiie): Changes the background of password entry fields to a four-color visual hash... Read More > or Download Now >
After you install this add-on, you'll be able to see a four-color visual "hash" in password inputs all around the web. The hash will update as you type. You can think of the hash as being your password's "fingerprint." Over time, you'll remember the colors associated with each password, which will prevent you from mistyping your passwords.