Examine source code of FB-Force-All-Comments

{
  "manifest_version": 2,
  "name": "FB-Force-All-Comments",
  "version": "1.3",
  "description": "Force All Comments for Facebook",
  "homepage_url": "https://github.com/timperi",
  "icons": {
    "48": "icons/zuck-48.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://www.facebook.com/*",
        "*://facebook.com/*"
      ],
      "js": [
        "sukkerperi.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{4102ebb5-ee9d-4e57-a5d9-8decb4f73dab}",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "*://www.facebook.com/*",
    "*://facebook.com/*"
  ]
}