LastPass is good extension. My boss uses it on his Mac when I was working as an SEO guy in Wyne Technologies Software House.

But I personally don't prefer extensions or apps because they are not that much secure. I have heard few weeks before that LastPass database got hacked and thousands of users were affected from hack. I usually save my passwords in separate laptop and for Steemit I have written them down on paper to make them super secure.

However, LastPass is still way more secure that saving in the browser. Hacking can happen in even most secure systems so we must not only rely on one extension or app but use multiple to recover them later.