justify-self not recognized?

I'll go to the point so this doesn't take much of your time:

I've recently used the validator, and in the results it says that the
*justify-self* property doesn't exist. I believe it does, because firefox
recognizes it and it works the expected way.

Thank you for your time.

Best regards,
Mauricio Rojas

Received on Thursday, 19 July 2018 05:36:19 UTC