Examine source code of Bigg Boss Filter

{
  "manifest_version": 2,
  "name": "Bigg Boss Filter",
  "version": "1.2resigned1",
  "description": "This extension will filter facebook posts related to big boss",
  "icons": {
    "16": "icon16.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "content_scripts": [
    {
      "run_at": "document_end",
      "matches": [
        "https://www.facebook.com/*"
      ],
      "js": [
        "background.js"
      ]
    }
  ],
  "permissions": [
    "activeTab"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{20f46225-169a-4b7b-95ff-6b54b6b2d94f}"
    }
  }
}