If you're interested in privacy or protecting your email address and you're still using Chrome or GMail you need to start by eliminating those and de-googleifying your life as much as possible.
Although it seems like a lot of people are forced into Google products by work, I can see the value of this for them.
This extension is also on Firefox. You don’t have to use Google to use it, it works well with my protonmail email.
Just tried it. Simple to use and seems to work reliably but the UI is a bit ugly. I like the fact that this extension doesn't ask any permission.