Examine source code of Facebook utils

{
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  "name": "__MSG_extensionName__",
  "version": "1.7.6",
  "description": "__MSG_description__",
  "author": "Phạm Trung Kiên",
  "icons": {
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png"
  },
  "default_locale": "en",
  "permissions": [
    "downloads",
    "http://*/*",
    "https://*/*",
    "storage",
    "tabs",
    "webRequest",
    "webRequestBlocking",
    "contextMenus"
  ],
  "browser_action": {
    "default_popup": "main/popup.html",
    "default_title": "__MSG_extensionName__",
    "default_icon": "icons/icon-48.png"
  },
  "background": {
    "scripts": [
      "libs/common.js",
      "libs/utils.js",
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://*/*",
        "http://*/*"
      ],
      "js": [
        "libs/utils.js",
        "libs/common.js"
      ]
    },
    {
      "matches": [
        "https://*.facebook.com/*"
      ],
      "js": [
        "libs/utils.js",
        "content-scripts/fb-stop-next-video.js"
      ]
    },
    {
      "matches": [
        "https://*.facebook.com/*"
      ],
      "js": [
        "libs/utils.js",
        "content-scripts/fb-remove-annoyances.js"
      ]
    },
    {
      "matches": [
        "https://*.facebook.com/*"
      ],
      "js": [
        "content-scripts/fb-see-more.js"
      ],
      "run_at": "document_end"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{d2a4ff63-0f31-4091-9107-a0536010b4e8}",
      "strict_min_version": "60.0"
    }
  }
}