Examine source code of Keepify Extention

{
  "manifest_version": 2,
  "name": "Keepify Extention",
  "version": "0.2resigned1",
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "data/content.js"
      ]
    }
  ],
  "browser_action": {
    "default_icon": "data/icon.png"
  },
  "background": {
    "scripts": [
      "scripts/background.js"
    ]
  },
  "permissions": [
    "menus",
    "activeTab"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{b47ea0a8-7405-40f0-a864-48fafc7f272d}"
    }
  }
}