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Extensions 
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Download Mark All Gmail Read chrome extension. Mark all Gmail under a label (all simply all) as read, in one click. and install in your Google chrome browser. This is Direct Mark All Gmail Read Crx download for Chrome it is also called Mark All Gmail Read offline CRX for chrome Download. This Mark All Gmail Read is used to Mark all Gmail under a label (all simply all) as read, in one click.
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Allows you to mark all messages as read with one click.
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Mark a page as read by clicking on the extension icon.
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Mark all bulletins as read on eRezLife for UCR staff
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Adds "Mark as read" capability to Confluence navigation
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Reddit extension - mark comments as read
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BetterMaplewood, a browser extension to make your maplewood experience better
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This Chrome Extension mark all the unread emails as read at once with the single click.
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Mark all IP Board forums as read
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Mark all Piazza posts as read upon closing the tab.
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Mark code which has been read.