You no longer have that important web security mechanism in place.Įxample: A user who doesn't log out of the banking site before closing the tab, and shares the screen with a malicious site afterwards. Once you share a browser window with a site, you’re allowing that site to see the results of other sites it summons, including your private information. It’s an important web security mechanism that exists in all browsers. For more technical information, see same-origin policy. Websites and ads have always been able to display content from other sites, but websites normally can’t read the pixels that make up the content on other sites. If you share your screen with a malicious website, that website now has the ability to browse as you, using any login information you may have already entered or stored, and to steal your private data.
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