Bing is not a web browser as such, The the latest w7 exploring system is IE9. Bing is a search engine like Google. I have Google as home page. If you click on the tools button (cog top right in toolbar, then on manage add ons then on manage search providers you can if you wish disable bing, as I have done.Just decide on what you want as home page and primary search provider.
OnePlus 5T review: Hands-on