unable to close tabs after a new tab is opened automatically and suddenly

Recently, after the latest update, this problem has been occurring quite often. When i am using multiple tabs, the browser will suddenly open a new tab automatically. The new tab is empty. When i try to close the tab, it cannot be closed. i tried closing other tabs that i was using but they too cannot be close. i have to restart the browser and the problem will be solved. But the problem will resurface after awhile of using multiple tabs again. The problem is more frequent when i am using more tabs.