True False 6 12 True False 0 none True False 6 12 True False Plain look, do not use background images True True False 0 True default_background False True 0 Pre-installed background image (if available) True True False 0 True own_background False True 1 True False True Own image True True False 0 True no_background False True 0 Select Background Image True True True False False 1 False True 2 True False Background Image False True 0 True False 0 none True False 6 12 True False Plain look, do not use Themes True True False 0 True default_persona False True 0 Pre-installed Theme (if available) True True False 0 True own_persona False True 1 True False True Own Theme True True False 0 True no_persona False True 0 Select Theme True True True False False 1 False True 2 True False Firefox Themes False True 1