Screen Shutter v1.0
This extension provides a toolbar button, and a keyboard shortcut (default: Ctrl + Shift + Up), to create a black overlay that fills the full height and width of the screen to obscure the page contents.
This extension provides a toolbar button, and a keyboard shortcut (default: Ctrl + Shift + Up), to create a black overlay that fills the full height and width of the screen to obscure the page contents.