I am pretty sure browser.search.openintab just affects searching from the address bar or the separate search bar if you have it active and does not alter how the links in the results page work.

I do know in Google's search settings, https://www.google.com/preferences the Other Settings section has a Results in New Window toggle.

Make sure in Tools -> Settings -> General -> Tabs section that Open links in tabs instead of new windows is selected so it opens them in tabs and not new windows.

I set that a long time ago to get the behavior you are wanting.

Hope that helps.

(Of course, you can always CTRL-Left Click a link to make it open in a new tab).

Good morning, Mark and thank you for your help! Yes, solved simply and easily indeed. I never knew that toggle even existed. I know, trivial perhaps, but it was driving me crazy!

I cannot thank you enough for your expedient and easy solution. Enjoy a very fine day. -- Randi