Examine source code of mikasa ackerman

{
  "name": "mikasa ackerman",
  "manifest_version": 2,
  "version": "2.0",
  "theme": {
    "images": {
      "theme_frame": "thumb-1920-1143210.jpg"
    },
    "colors": {
      "frame": "rgba(229, 230, 232, 1)",
      "tab_background_text": "rgba(102, 15, 12, 1)",
      "toolbar": "rgba(0, 0, 0, 0.3)",
      "bookmark_text": "rgba(255, 88, 82, 1)",
      "toolbar_field": "rgba(0, 0, 0, 0.4)",
      "toolbar_field_text": "rgba(140, 14, 14, 1)",
      "tab_line": "rgba(0, 0, 0, 0.2)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{2292b799-288b-4da9-ae15-c041ce025552}"
    }
  }
}