Examine source code of Happy Break Through

{
  "name": "Happy Break Through",
  "manifest_version": 2,
  "version": "4.0",
  "theme": {
    "images": {
      "theme_frame": "header.png"
    },
    "colors": {
      "frame": "rgba(163, 15, 10, 1)",
      "tab_background_text": "rgba(255, 255, 255, 1)",
      "toolbar": "rgba(163, 20, 10, 0.04)",
      "bookmark_text": "rgba(255, 255, 255, 1)",
      "toolbar_field": "rgba(194, 62, 52, 0.11)",
      "toolbar_field_text": "rgba(255, 255, 255, 1)",
      "tab_line": "rgba(255, 255, 255, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{799ee65e-3cb1-4807-9167-9dbfa317ef0e}"
    }
  }
}