Examine source code of Red Pixel

{
  "name": "fire-joypixels",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "wp2601078-kali-linux-wallpaper-1920x1080.jpg"
    },
    "colors": {
      "frame": "rgba(161, 74, 74, 1)",
      "tab_background_text": "rgba(179, 111, 111, 1)",
      "toolbar": "rgba(122, 46, 46, 1)",
      "toolbar_field": "rgba(235, 52, 52, 1)",
      "tab_line": "rgba(84, 112, 199, 0.75)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{55f1bd22-6876-4bc6-9dc0-0e05a74733ea}"
    }
  }
}