Examine source code of Stream Clean

{
  "manifest_version": 2,
  "name": "Stream Clean",
  "short_name": "Stream Clean",
  "description": "Filters profanity and other user-defined words on Netflix, Amazon, Hulu, Disney+, and more using closed captions.",
  "version": "2.4.29",
  "background": {
    "persistent": true,
    "scripts": [
      "scripts/streamClean.js",
      "scripts/filter.js",
      "scripts/eventPage.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "scripts/_app.js",
        "scripts/tabLoaded.js"
      ],
      "run_at": "document_end"
    }
  ],
  "options_ui": {
    "page": "settings.html",
    "chrome_style": true
  },
  "browser_action": {
    "default_icon": "images/icon-128-bw.png",
    "default_popup": "popup.html"
  },
  "permissions": [
    "storage"
  ],
  "icons": {
    "128": "images/icon-128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{78a83f2c-a572-455f-8f14-1fe9cbde49b7}"
    }
  }
}