How can i stop google to not remembering usernames?

Just mention don't remember when it asks for you to remember. This is how you can do it. Its very simple process.

IN firfox: If you dont wish to clear stored websites and data: Go to: Tools - Options - Advanced (Tab) - Network - Offline Storage + choose Clear Now To clear all passwords and data Tools - Options - Private Data - Setting - choose them all and then hit clear Now For iExplorer Tools - Tools - Internet Options - In General Tab - Browsing history and Delete all Data I hope this helps.