I have writed an article Change Firefox background with Personas,that you can change your firefox themes by selecting in provided skins.This tutorial shows how to add your photos as Firefox themes from local machine and internet.

From this page,click Download and Canvas will be installed properly.

Restart Firefox,and you will see this tips shows how to use it.


The recommended photo size is high:600,wide:1500-3000.You can manage the appearance in the right of Manage window