The overall features are great! But one thing that I had in mind is that users likes custom themes for their website, so in order for that to work yes there is custom colors and such but some likes to have their own picture as their background such as me. So I hope this will be added, cause this is a very big must for most users.
I agree, without the ability to load custom textures Firefox Color is a step backwards from Personas Plus.
Custom images are coming soon
And custom images have arrived! We just deployed v2.0.0, now with support for importing images from your local machine.