Switch - Search With от Rishabh

Switch is an extension which adds a "Search with (search engine)" button in the context menu when you highlight text. This works with every installed search engine you have. Search engines can be (but are not limited to) Google, DuckDuckGo, Wikipedia, Amazon, eBay, Bing, Youtube. To use more search engines, just install them in Firefox!

Icon is from Material Icons (by Google).