Examine source code of Facebook Sticker Remover

{
  "author": "m-a-r-c-el-o",
  "permissions": [
    "*://*.facebook.com/*"
  ],
  "browser_action": {
    "default_icon": "icon48.png"
  },
  "content_scripts": [
    {
      "js": [
        "index.js"
      ],
      "matches": [
        "*://*.facebook.com/*"
      ],
      "run_at": "document_start"
    }
  ],
  "description": "Completely hide Facebook Sticker Comments",
  "icons": {
    "48": "icon48.png",
    "64": "icon64.png",
    "128": "icon128.png"
  },
  "manifest_version": 2,
  "name": "Facebook Sticker Remover",
  "version": "1.1resigned1",
  "browser_specific_settings": {
    "gecko": {
      "id": "{4e5b42b6-fc71-44f1-84bd-6baa1d7c9143}"
    }
  }
}