Examine source code of CalmGreen

{
  "manifest_version": 2,
  "version": "1.0",
  "name": "CalmGreen",
  "theme": {
    "images": {},
    "properties": {},
    "colors": {
      "toolbar": "rgb(164, 208, 180)",
      "toolbar_text": "rgb(0, 0, 0)",
      "frame": "rgb(110, 180, 136)",
      "tab_background_text": "rgb(0, 0, 0)",
      "toolbar_field": "rgb(110, 180, 136)",
      "toolbar_field_text": "rgb(0, 0, 0)",
      "tab_line": "rgb(255, 255, 255)",
      "popup": "rgb(255, 255, 255)",
      "popup_text": "rgb(0, 0, 0)",
      "button_background_active": "rgb(255, 255, 255)",
      "tab_loading": "rgb(255, 255, 255)"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{8a806696-2109-4de4-8897-c496c3bf6792}"
    }
  }
}