Examine source code of FF7 Classic

{
  "theme": {
    "images": {
      "theme_frame": "FirstFFVIIHeader.jpg"
    },
    "colors": {
      "frame": "#0900ff",
      "tab_background_text": "#000000"
    }
  },
  "version": "2.0",
  "name": "FF7 Classic",
  "manifest_version": 2,
  "description": "I was looking for a FF7 theme for my Firefox persona. When I couldn't find one, I decided to make my own. Enjoy!"
}