[SippinLean]

Does it officially support every major browser on my desktop and phone? Anything that doesn't is still less useful to be than LastPass.

[stable-point]

I don't think it supports any browsers via plugin. You use a separate app to unlock your keychain, it places the relevant password on your clipboard and then it clears the clipboard 30s later. Very simple and therefore avoids a whole bunch of vulnerabilities other password managers (like LastPass) introduce by integrating with browser plugins.

[SippinLean]

Sounds a lot more complicated than automatically logging me in without need for any action on my part like LastPass