One of the coolest and much needed features that BlackBerry added in BlackBerry 10 is the ability to save passwords in the browser. It simply prompts you after you login to a website if you wish to save the password for later use. Next time you browse to the page the username and password will be prefilled. If you try to change the password you will be asked if you want to overwrite it. They also added the ability for you to move from one form item to another using the next, previous, and submit buttons.
I personally found the feature awesome but I wish it would integrate with the Password Keeper app from BlackBerry. I know they have plans to do something along that route with the ability to edit your saved credentials later.