Examine source code of Anti-distractor for StackExchange

{
  "manifest_version": 3,
  "version": "1.6",
  "name": "Anti-distractor for Stack Exchange",
  "short_name": "AD for SE",
  "description": "Allows you to remove distracting elements on Stack Exchange.",
  "icons": {
    "32": "icons/32.png",
    "48": "icons/48.png",
    "128": "icons/128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{35a7ca1b-9620-4520-8ffc-9acfc65355ac}",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "permissions": [
    "storage"
  ],
  "action": {
    "default_popup": "popup.html",
    "default_icon": "icons/32.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.askubuntu.com/*",
        "*://*.mathoverflow.net/*",
        "*://*.serverfault.com/*",
        "*://*.stackapps.com/*",
        "*://*.stackexchange.com/*",
        "*://*.stackoverflow.com/*",
        "*://*.superuser.com/*"
      ],
      "js": [
        "functions.js",
        "script.js"
      ]
    }
  ]
}