Examine source code of Tiny Tinkerbell

{
  "name": "Tiny Tinkerbell",
  "manifest_version": 2,
  "version": "1.0",
  "theme": {
    "images": {
      "theme_frame": "Tiny Tinkerbell.png"
    },
    "colors": {
      "frame": "rgba(8, 31, 47, 1)",
      "tab_background_text": "rgba(169, 210, 232, 1)",
      "toolbar": "rgba(8, 31, 48, 0)",
      "bookmark_text": "rgba(169, 210, 232, 1)",
      "toolbar_field": "rgba(8, 31, 48, 0)",
      "toolbar_field_text": "rgba(41, 141, 204, 1)",
      "tab_line": "rgba(255, 255, 255, 1)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{9820340e-b90b-49f3-aa88-3b9c0d102fd9}"
    }
  }
}