Remembering Passwords is awful. It's not something anyone likes, and with people needing more online accounts than ever, it's becoming entirely unmanageable. Remember, using the same password twice is a BAD IDEA. Pass is an old school command line tool that's known for top-notch password management. You can always still use that, but QtPass gives you a more convenient GUI on top of Pass, and PassFF lets you use the password database you create directly with Firefox. Installing these tools on just about any distribution is very simple, and the end result will make your online life a lot easier.