How to Do an Instant Site Search with a Keyword in Firefox May 10, 2021, 9:00 am EDT | 2 min read Mozilla Firefox lets you trigger bookmarks with a custom keyword in the address bar. With this feature and a custom bookmarklet, you can quickly search a site using Google, Bing, or DuckDuckGo. Here’s how. The Power of Bookmarklets Bookmarklets are browser bookmarks containing tiny snippets of JavaScript code that allow for more powerful features than a standard bookmark. In our case, we’ll be using a JavaScript bookmarklet in Firefox to do a site search using the address of the site you’re currently browsing.