Yahoo doesn’t have (that I know of) a browser – if I had to hazard a guess, I’d say you have Yahoo set as your default SEARCH provider. It get a bit complex, especially for non-techies but Edge, Chrome, Internet Explorer, Opera, Firefox (and more) are browsers – a browser is the software which you use to show web pages.
Bing, Google, Yahoo etc are search providers and they are the ones you give you results when you search for something.
When you get a new PC (or build one) it’ll almost always come with Edge as the default brower, and Bing as the default search engine, neither of which I personally rate highly – personally, I go with Chrome as my brower and google as my search provider but that does NOT mean they’re the best, they’re just my preference.
"Man is born in freedom, but he soon becomes a slave, in cages of convention, from the cradle, to the grave."