Examine source code of Mega Mining

{
  "name": "Mega",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "Free Bitcoin Mining.png"
    },
    "colors": {
      "frame": "rgba(232, 227, 232, 1)",
      "tab_background_text": "rgba(217, 13, 13, 1)",
      "toolbar": "rgba(0, 0, 0, 1)",
      "bookmark_text": "rgba(0, 0, 0, 1)",
      "toolbar_field": "rgba(186, 24, 24, 1)",
      "toolbar_field_text": "rgba(178, 30, 232, 1)"
    }
  }
}