Examine source code of maccya

{
  "name": "maccya",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "maccya-f.png"
    },
    "colors": {
      "frame": "rgba(229, 230, 232, 1)",
      "tab_background_text": "rgba(245, 250, 248, 1)",
      "toolbar": "rgba(2, 71, 1, 1)",
      "toolbar_field": "rgba(250, 250, 240, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{7469654e-aba9-4b4e-9c88-685895462e2b}"
    }
  }
}