Chrome //
Extensions 
Chrome
Web store 
Download Google Chat Mark as Read chrome extension. Adds button to quickly mark all Google Chat Room notifications as read and install in your Google chrome browser. This is Direct Google Chat Mark as Read Crx download for Chrome it is also called Google Chat Mark as Read offline CRX for chrome Download. This Google Chat Mark as Read is used to Adds button to quickly mark all Google Chat Room notifications as read
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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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Be invisible on WhatsApp™ Web by disabling read receipts and presence updates
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Adds "Mark as read" capability to Confluence navigation
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Mark all Gmail under a label (all simply all) as read, in one click.
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Reddit extension - mark comments as read
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This Chrome Extension mark all the unread emails as read at once with the single click.
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Be invisible on WhatsApp™ Web by disabling read receipts and presence updates
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Allows you to mark all messages as read with one click.
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Mark all IP Board forums as read