Examine source code of Simple Text Editor

{
  "manifest_version": 2,
  "name": "Simple Text Editor",
  "version": "1.0",
  "description": "Edit text areas directly from the popup interface.",
  "icons": {
    "48": "icon.png"
  },
  "permissions": [
    "activeTab"
  ],
  "browser_action": {
    "default_icon": "icon.png",
    "default_popup": "popup.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{178f00a4-a7c8-4ebe-9dbd-5a51fbb7fa83}"
    }
  }
}