Examine source code of Simple Password Generator

{
  "manifest_version": 2,
  "name": "Password Generator",
  "version": "1.0",
  "description": "A simple password generator",
  "icons": {
    "48": "icon.png"
  },
  "browser_action": {
    "default_icon": "icon.png",
    "default_popup": "popup.html"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{e95683e2-6da0-41e5-be73-79bd5f703317}"
    }
  }
}