Examine source code of FB video ads Blocker

{
  "description": "Block FB Ads",
  "manifest_version": 2,
  "name": "FB-video-ads-Blocker",
  "version": "1.1",
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "https://www.facebook.com/"
  ],
  "icons": {
    "48": "icons/fbadsp-48x48.png"
  },
  "background": {
    "scripts": [
      "web_respn.js"
    ]
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{21480cc9-3953-485e-b8d0-44f2f85b7a32}"
    }
  }
}