Camera Firmware Updates

Two of mine are 2.5.2.76 and one is 2.6.0.99. The only thing different between them I can think of is the one with newer version I had unplugged for maybe 5-10 minutes several days ago.

FWIW, I unplugged the cam that still had 2.5.2.76 and let it sit for a few minutes. Reconnected it and checked the version a while later, it too now has 2.6.0.99.

How do you find the firmware version?

Go into the Camera Settings and scroll all the way to the bottom of the page/screen. You have to check each one individually.