To remove it, right-click anywhere on the bookmarks bar and disable "Show Tab Groups." You'll know it's disabled because the button will disappear, and there won't be a check mark symbol next to ...

To enable the search tabs in Google Chrome, open the Chrome browser first and make sure you have updated to the latest version of the browser. In the address bar, type chrome://flags, and press enter.

Click the "Firefox" button on the top left corner of the browser window and then click "Options." Click the "Content" tab and then click the "Advanced" button next to the "Enable JavaScript" section.