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20-20-20

Author(s):



Take care of your eyes, use this nifty addon. It reminds you after every 20 minutes, to look away from the monitor for 20 seconds, and focus at an object at least 20 feet (6 metres) away.

Download files:

20-20-20-1.3.1-signed.1-signed.xpi
20-20-20-1.4.1-signed.1-signed.xpi




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