Examine source code of Trigger Remover

{
  "name": "TriggerRemover",
  "version": "0.3.2",
  "description": "Remove Trigger-inducing content from pages",
  "homepage_url": "https://github.com/operatorequals/TriggerRemover",
  "manifest_version": 2,
  "icons": {
    "16": "assets/images/icon16.png",
    "32": "assets/images/icon32.png",
    "48": "assets/images/icon48.png",
    "128": "assets/images/icon128.png"
  },
  "browser_action": {
    "default_popup": "popup.html",
    "browser_style": true
  },
  "permissions": [
    "storage"
  ],
  "options_ui": {
    "page": "options.html",
    "browser_style": false
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{0ccd44a4-1966-4dfb-aa2d-a24fed3a4753}"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "https://*.youtube.com/**"
      ],
      "js": [
        "assets/js/lib/browser-polyfill.min.js",
        "assets/js/trigger-remover.js",
        "assets/js/utils.js",
        "assets/js/page-purifier-youtube.js"
      ],
      "run_at": "document_end"
    }
  ]
}