Revion Multisearch is a searching widget which supports all 3 major search engines: DuckDuckGo (default), Bing and Google

All you need to do is right click > Search Engines > Choose your favorite search engine and you are ready to search! (even the logo changes, which looks pretty cool )
Your choice is saved, so you don't have to do it again on reload!

Note: Feel free to suggest other search engines, I'll be glad to add them!