Examine source code of PrivacyCheck

{
  "manifest_version": 2,
  "name": "PrivacyCheck",
  "description": "This extension summarizes privacy policies.",
  "version": "1.2.1resigned1",
  "browser_action": {
    "default_title": "PrivacyCheck",
    "default_icon": "icon3.png",
    "default_popup": "popup.html"
  },
  "background": {
    "page": "background.html"
  },
  "web_accessible_resources": [
    "icon3.png"
  ],
  "permissions": [
    "tabs",
    "<all_urls>"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{1262a41a-36a0-4da3-ad89-c87ec20ef758}"
    }
  }
}