Examine source code of Aru Source Captioner

{
  "manifest_version": 3,
  "name": "Aru Source Captioner",
  "version": "0.1.1",
  "description": "루리웹 글쓰기 페이지에서 이미지 메타데이터의 출처 URL을 읽어 자동으로 출처 캡션을 삽입합니다.",
  "permissions": [
    "storage",
    "downloads",
    "nativeMessaging"
  ],
  "host_permissions": [
    "https://bbs.ruliweb.com/community/board/300143/*",
    "https://bbs.ruliweb.com/community/board/*/read/*",
    "https://m.ruliweb.com/community/board/300143/*",
    "https://m.ruliweb.com/community/board/*/read/*"
  ],
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "action": {
    "default_title": "Aru Source Captioner",
    "default_icon": {
      "16": "icons/icon16.png",
      "32": "icons/icon32.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "https://bbs.ruliweb.com/community/board/300143/*",
        "https://bbs.ruliweb.com/community/board/*/read/*",
        "https://m.ruliweb.com/community/board/300143/*",
        "https://m.ruliweb.com/community/board/*/read/*"
      ],
      "js": [
        "lib/exifr.full.umd.js",
        "content.js"
      ],
      "css": [
        "styles.css"
      ],
      "run_at": "document_idle"
    }
  ],
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "aru-source-captioner-firefox@sdh-dot.github.io",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  }
}