Examine source code of Black in the light

{
  "name": "Black in the light",
  "manifest_version": 2,
  "version": "8.0",
  "theme": {
    "images": {
      "theme_frame": "Screenshot (214).png"
    },
    "colors": {
      "frame": "rgba(82, 82, 82, 1)",
      "tab_background_text": "rgba(237, 237, 237, 1)",
      "toolbar": "rgba(55, 55, 55, 1)",
      "bookmark_text": "rgba(237, 237, 237, 1)",
      "toolbar_field": "rgba(40, 40, 40, 1)",
      "toolbar_field_text": "rgba(237, 237, 237, 1)",
      "tab_line": "rgba(55, 55, 55, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{70f9da90-789e-4d7f-9b26-3db4ee4010ca}"
    }
  }
}