How to get PS3 Firmware update 4.90 for installing, Google and Edge covered in the video - YouTube
PS3 Firmware 4.88 released, do not update just yet - Wololo.net
PlayStation 3's last system update seemingly killed console for good
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Sony PlayStation 3 Firmware 4.90 Download | TechSpot
The PS3™ Guides: Updating Your PS3 - YouTube
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PlayStation 3 - Wikipedia
How to update PS3: with USB, in safe mode
update 4.89 just dropped. : r/PS3
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How to update playstation 3 system software - YouTube