Accessing non-work related or social networking sites such as Twitter, Facebook and YouTube are strictly prohibited in Offices, yet you can able to visit those sites in Office and you need a panic button to hide the content when your boss comes across your cabin Boss Alert Chrome extension is the panic button all you need to press ` or ~ key where images on the current page will fade away and text turns into Latin which on close look may confuse your Boss as he can’t understand what you’re actually looking at.

YouTube page can't be recognized after using Boss Alert in Chrome

You can bring back Latin text and faded images to normal by pressing the same key, you can assign your own key from the extension options. After installing this extension you need to reload current tabs for the extension key to become active and work.