Examine source code of Just Another Redirector

{
  "manifest_version": 2,
  "name": "Just Another Redirector",
  "version": "1.0",
  "description": "Down with automatic signup modals...",
  "icons": {
    "48": "boostrap-icon-signpost-2.svg",
    "96": "boostrap-icon-signpost-2.svg"
  },
  "permissions": [
    "activeTab"
  ],
  "content_scripts": [
    {
      "matches": [
        "*://*.twitter.com/*",
        "*://*.reddit.com/*",
        "*://*.youtube.com/*",
        "*://*.instagram.com/*"
      ],
      "js": [
        "utils.js",
        "redirector.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{4271b21c-014b-4c98-a4f0-db9c1f7f3902}"
    }
  }
}