How to make safari my web browser.

Bing is not a web browser. It's a search engine.

Assuming you're using Safari as your browser, the issue is your default search engine.

In Safari -> Preferences, under Search, there is a 'Search Engine' option. Change it to your preferred search engine:

Open the Safari app on your Mac, click Preferences in the menu named Safari, click General at the top of the Preferences window, click the Set Default button where it says "Safari is not your default web browser."