Screen Shutter
An extension to hide the contents of the page you're currently viewing.
Screen Shutter - Hide Page Contents
Screen Shutter is a Firefox add-on that provides a toolbar button and a keyboard shortcut to create a black overlay, obscuring the page contents.
Add-on stats
Weekly download count: NaN
Firefox on Android: No
Risk impact: High risk impact 
Risk likelihood:
Manifest version: 2
Permissions:
- activeTab
- tabs
- <all_urls>
Size: 25.24K
URLs: Website
Ranking
Other platforms
Not available on Chrome
Not available on Android
Not available on Edge
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Add-on summary
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.
Add-on safety
Risk impact
Screen Shutter requires some sensitive permissions that could impact your browser and data security. Exercise caution before installing.
Risk likelihood
Screen Shutter has earned a fairly good reputation and likely can be trusted.
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