Examine source code of Ads Blocker for Facebook

{
  "name": "Ads Blocker for Facebook",
  "short_name": "Ads Blocker for Facebook",
  "version": "1.0.1",
  "description": "Remove All Ads on Facebook! Super Lightweight, small and FAST. Unlike the other extensions, it will not slow you down.",
  "manifest_version": 2,
  "permissions": [
    "tabs",
    "webRequest",
    "*://*/*",
    "contextMenus",
    "webNavigation",
    "webRequestBlocking",
    "storage"
  ],
  "browser_action": {
    "default_popup": "options/index.html",
    "default_title": "Ad Blocker",
    "default_icon": "img/icon.png"
  },
  "background": {
    "scripts": [
      "scripts/background.js"
    ]
  },
  "icons": {
    "32": "img/icon.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.facebook.com/*"
      ],
      "js": [
        "scripts/fas1.js"
      ],
      "run_at": "document_start"
    },
    {
      "matches": [
        "*://*.facebook.com/*"
      ],
      "js": [
        "scripts/jquery.js",
        "scripts/fae1.js"
      ],
      "run_at": "document_end"
    }
  ]
}