I used to use LastPass, decided to switch to a nice open source password manager. Cue Bitwarden being my pick and me being 100% happy with my choice! I can't rate it highly enough, nor recommend it enough. Generate a 7+ word long passphrase using diceware as your master password and generate 128 character long passwords for all your websites.

Update: Over a year later. I bought premium to help support the devs (I mean really, $10 a month is a steal). I couldn't be happier with Bitwarden. Extension works flawlessly, so does the Android, and iOS apps.