Examine source code of Stop Bufale

{
  "name": "Stop Bufale",
  "short_name": "Stop Bufale",
  "version": "1.8resigned1",
  "description": "Questa estensione segnala i siti di notizie false mentre navighi tranquillamente sul web.",
  "icons": {
    "48": "data/images/icon-48.png"
  },
  "permissions": [
    "activeTab",
    "tabs",
    "https://*/*",
    "http://*/*",
    "*://*/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": "data/images/icon-48.png",
    "default_title": "Stop Bufale",
    "default_popup": "popup.html"
  },
  "manifest_version": 2,
  "browser_specific_settings": {
    "gecko": {
      "id": "{a395df78-b489-4540-a329-4ef59ead546d}"
    }
  }
}