Your extension options will be saved in your Chrome installation, and synced between all your Chrome browsers if you've enabled sync.
The Screen Capture extension allows you to take a screenshot of the actual page you're viewing. This is done by clicking the extension's icon in Chrome's toolbar. By doing this, the extension will capture a screenshot and will open a new tab with this screenshot, so you can save it. The extension will not share this screenshot with any third party nor store it anywhere: if the screenshot is not saved to the local drive, it is essentially lost.
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