Examine source code of SILVER-DEVIL

{
  "theme": {
    "images": {
      "theme_frame": "Personas1SILVERDEVIL.jpg"
    },
    "colors": {
      "frame": "#0091ff",
      "tab_background_text": "#0055ff"
    }
  },
  "version": "2.0",
  "name": "SILVER-DEVIL",
  "manifest_version": 2,
  "description": "Something I made for my Youtube Channel and then I thought it would be good for my new Firefox Persona"
}