Firefox has a built-in option to send your searches to DuckDuckGo. This articles describes how to select it: [[Change your default search settings in Firefox]]. But you might also have been using the DuckDuckGo Privacy Essentials add-on. Does that sound familiar? The following page has more information: https://addons.mozilla.org/firefox/addon/duckduckgo-for-firefox/ You mentioned that you need to get your DuckDuckGo bookmarks back. I'm familiar with Firefox bookmarks, but not DDG bookmarks. Are these stored on their website? If the problem is that you lost your Firefox bookmarks -- for example, you press Ctrl+B to open the Bookmarks Sidebar and they're not listed -- please see the following article: [[Recover lost or missing Bookmarks]]. Any progress so far?