To figure out which one it is, please re-enable your extension one by one and restart Google. If the issue doesn't appear, it means the extension should be the culprit.
Step 4: When you disable all extensions, please restart Google and see if two tabs will open. Step 3: On the Extensions page, toggle the turn-on switch to the left side to disable the extensions you are using. Step 2: Move your cursor over the More tools option in the Chrome menu and then choose the Extensions option. Step 1: Open the Chrome menu by clicking the three vertical dots. If the first fix does not work, please try disabling all your extensions on Chrome.