@breitensteinart Maybe I've figured it out. At the top of the Search preferences in Firefox there is only a drop-down menu with set choices. Near the bottom of the page is a section Search Shortcuts that includes a box that lists search engines with their keywords; below that is an Add button that I assumed added keywords. But when I tried it that button brought up a dialog where I could fill in a new search engine. I used your suggestion. Then back up at the top the new NoAI-DDG I added was an option in the drop-down box.That seems to work. Thanks.There doesn't seem to be the same customization for Safari, but by opening the DuckDuckGo settings from the DDG search page in Safari I did find the same 3 settings to control AI as is in the Firefox browser. And I do have DDG as my default search engine in Safari, so that should hopefully accomplish the same thing.