If you don’t want to type your master password and unlock BW each time you open the browser, then you could set to not lock it at all in extension settings - I think this is same level of BW content protection, as you’ve proposed.
But maybe I’ve missed some technical background under your idea…
Definitely read your reply with a “Bill and Ted” tone.
We’ll see how the browser extension / desktop app integrations are needed as we bring biometrics to the extensions. Perhaps this could come at some point with that architecture change, but of course further investigation will have to be done.
You might want to take a look at the “Lightning Reopen” extension, because as far as I can see, there’s hardly anything to it. Just set a flag in Chrome or something? Stick the option in BW and it’s all done.