How do I get rid of the Avast SafeZone browser?

I use the Avast anti-virus on my PC (laptop), and I generally like it OK. One thing I didn’t like was that it automatically and surreptitiously downloaded its own browser, called SafeZone, to my computer without my consent.
Not only that, but whenever I am on one of my regular browsers and I happen to access a financial or shopping site, it always pops up a message asking me if I want to use SafeZone to access that site, and it continues to do so even if I click the button “Don’t ask me again”. There is no obvious way to remove SafeZone, so that’s why I’m asking it here, since I know that several jellies like Avast. Help!