Multi-account containers. Let's you have 2 different Gmail accounts open at once. Also I try to silo different parts of my life to prevent tracking.

Noscript and tampermonkey too.

We know it's not what you said because those are not reasons allowed for MAID at this time.

Is anthrax just naturally out there for anyone to contract?

It's more to setup, but I have my keepass auto sync across several devices using OneDrive. Each device has a local copy of the database that is synced with the cloud version using triggers.