split out private screenshots into a section
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<h2><a href="#table-of-contents">Table of contents</a></h2>
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<ul>
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<li><a href="#grapheneos">GrapheneOS</a></li>
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<li>
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<a href="#grapheneos">GrapheneOS</a>
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<ul>
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<li><a href="#private-screenshots">Private screenshots</a></li>
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</ul>
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</li>
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<li><a href="#services">Services</a></li>
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<li><a href="#project">Project</a></li>
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</ul>
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@ -316,11 +321,28 @@
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compatible with an OS not including any carrier bloatware apps and disabling
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various misfeatures such as disallowed tethering, disallowed 2G toggle,
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etc.</li>
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<li>Screenshot EXIF metadata is reduced by not including information on the OS
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and OS version so that it's only clear it's an OS including this feature. The
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inclusion of timestamps is also disabled by default with an opt-in toggle for
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the user to enable it.</li>
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</ul>
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<section id="private-screenshots">
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<h3><a href="#private-screenshots">Private screenshots</a></h3>
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<p>GrapheneOS disables the inclusion of sensitive metadata in screenshots.</p>
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<p>On Android, each screenshot includes an EXIF Software tag with detailed OS
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build/version information (<code>android.os.Build.DISPLAY</code>). It's the
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same value shown at Settings ➔ About device ➔ Build number. This leaks the OS,
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OS version and also usually the device family/model since builds are usually
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specific to a family of devices. GrapheneOS completely disables this tag.</p>
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<p>On Android, each screenshot also includes EXIF tags with the local date,
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time and timezone offset. GrapheneOS disables this by default in order to
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avoid leaking the time and quasi-location information through metadata that
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isn't visible to the user. The date and time are already included in the file
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name of the screenshot which is fully visible to the user and can be easily
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modified by them without a third party tool. GrapheneOS includes a toggle for
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turning this metadata back on in Settings ➔ Privacy since some users may find
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it to be useful.</p>
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</section>
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</section>
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<section id="services">
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