For  Google search results,  unless we open search result in a new tab or double clicking on the search result will open in the same tab,  for both the cases we either have to open the new tab or leave the Google search results page, try Untabbed, offers one tab search where you don’t have to leave the search results page and at the same time search result will open in the same page in a mini-window.

Untabbed

Untabbed offers search box, search results for Untabbed are powered by Google.  Each search result opened in same page in a mini-window. These mini-windows user interface reminds you of Google Chrome.

You can minimize these mini-windows on the same page, so no matter how many search results you open on Untabbed,  you can allow some to stay on the page and some to get minimized.