I tend to use different search engines for different purposes. For example, when I want better privacy, I use DuckDuckGo. When shopping, I might use Amazon, and if I need AI, I might opt for Perplexity. In other words, multiple configured search engines are necessary. For most browsers, you configure individual search engines. Some browsers even allow you to configure a search engine such that it'll be used by first typing a keyword in the address bar (such as duck for DuckDuckGo).
While AI companies, startups, and others are rolling out their own web browsers that embed AI services deep into the web surfing experience, Mozilla's Firefox is instead allowing its customers to swap out their default search engine for an AI-powered search option in the browser they already use. The company on Tuesday announced that it's bringing AI answer engine Perplexity to Firefox, letting customers decide whether they want to use AI to search the web and find new information.