Examine source code of BilingualTube

{
  "manifest_version": 3,
  "name": "BilingualTube",
  "description": "Watch YouTube with bilingual subtitles for language learning and comprehension.",
  "version": "0.1.17",
  "icons": {
    "16": "icon/16.png",
    "32": "icon/32.png",
    "48": "icon/48.png",
    "96": "icon/96.png",
    "128": "icon/128.png"
  },
  "permissions": [
    "storage"
  ],
  "host_permissions": [
    "<all_urls>"
  ],
  "author": "rxliuli",
  "action": {},
  "homepage_url": "https://rxliuli.com/project/bilingualtube/",
  "web_accessible_resources": [
    {
      "resources": [
        "/onnxruntime-web/ort-wasm-simd-threaded.wasm",
        "/sherpa-onnx-online-punct-en-2024-08-06/bpe.vocab",
        "/sherpa-onnx-online-punct-en-2024-08-06/model.int8.onnx",
        "/cjk-punct-ja/model.int8.onnx",
        "/cjk-punct-ja/vocab.json"
      ],
      "matches": [
        "https://www.youtube.com/*"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "bilingualtube@rxliuli.com",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "options_ui": {
    "open_in_tab": false,
    "page": "options.html"
  },
  "content_scripts": [
    {
      "matches": [
        "https://www.youtube.com/*"
      ],
      "run_at": "document_start",
      "js": [
        "content-scripts/content.js"
      ],
      "world": "MAIN"
    },
    {
      "matches": [
        "https://www.youtube.com/*"
      ],
      "run_at": "document_start",
      "js": [
        "content-scripts/proxy.js"
      ]
    }
  ]
}