Examine source code of FlashCaption - Live Captions

{
  "manifest_version": 3,
  "name": "FlashCaption - Live Captions & Translation",
  "version": "1.9.1",
  "description": "Real-time AI captions and translation for any livestream or video. Watch YouTube, Twitch, and more with instant on-screen subtitles.",
  "permissions": [
    "storage",
    "activeTab",
    "scripting"
  ],
  "host_permissions": [
    "*://*.flashcaption.com/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_end"
    }
  ],
  "action": {
    "default_popup": "popup.html",
    "default_icon": {
      "16": "assets/icon16.png",
      "128": "assets/icon128.png"
    }
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "flashcaption@flashcaption.com",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": [
          "technicalAndInteraction"
        ]
      }
    }
  },
  "web_accessible_resources": [
    {
      "resources": [
        "pcm-processor.js"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ]
}