DuckDuckGo and Google, although I barely use any search engine. I use Firefox search keywords to emulate DuckDuckGo's bangs (and much more), download, browse a

DuckDuckGo and Google, although I barely use any search engine. I use Firefox search keywords to emulate DuckDuckGo's bangs (and much more), download, browse and search documentation on disk when possible, and use the location bar's immediate search on history and bookmarks to its extreme. I notice people have no idea how faster it is to actually wait half a second for the suggestions on bookmarks/history to load and quickly skim them and find what you're searching, although it only works if your history dates back to 7 years and you basically have half the web in your Firefox history. When I really need a search engine, my algorithm is the following: do I just want the link to a specific site/page I'm thinking about? Yes -> DuckDuckGo. No -> Google.