Hangout Forever is a social & communication chrome extension. it's a free extension , it has 144 active users since released its first version, it earns an average rating of 5.00 from 9 rated user, last update is 3848 days ago.
Google+ Hangouts automatically ask "Are you still there?" every 90 minutes – this extension automatically simulates clicks "Yes".
You could download the latest version crx file or older version files and install it.
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100% user give 5-star rating. Read reviews of hangout forever
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Does what it says. I now Hangout... Forever! Very useful when using Hangouts for group chat while PC gaming.
Just what you need to keep it going !!!
This seems promising but I have yet to test it. And especially see if it works when running full screen applications and having Hangouts in the background.