Examine source code of Subadub-full-opacity

{
  "manifest_version": 3,
  "name": "Subadub",
  "description": "Enhanced Netflix subtitles for foreign language study",
  "version": "0.1.12",
  "icons": {
    "16": "icon16.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://www.netflix.com/*"
      ],
      "run_at": "document_end",
      "js": [
        "content_script.js"
      ]
    }
  ],
  "web_accessible_resources": [
    {
      "resources": [
        "page_script.js"
      ],
      "matches": [
        "https://www.netflix.com/*"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "hexogrammer@gmail.com",
      "strict_min_version": "58.0"
    }
  }
}