About Blank Block

Close tabs starting with about:blank, about:srcdoc, blob:, data:, javascript:, or file: after 5 seconds.

Keep lingering blank tabs from cluttering your browser. About Blank Block automatically closes any tab that stays at about:blank for five seconds. It works quietly in the background, with no setup required. • Great for Schools and About:Blank Proxy Sites • Closes lingering about:blank tabs automatically. • Gives every blank tab its own five-second countdown. • Pulses and flashes the toolbar logo bright red while a blank tab is counting down. • Cancels the countdown when the tab navigates elsewhere. • Leaves ordinary websites and Chrome's New Tab page alone. • Works with existing blank tabs when the extension starts. About Blank Block checks tab URLs locally. It does not collect, save, or transmit your browsing activity, and includes no advertising or analytics. The extension targets the exact about:blank URL. Active and pinned blank tabs are included. Closing the last tab can close its window. Sleep or browser suspension may delay the countdown.