Examine source code of Sublern — AI Translate Words in Video Subtitles

{
  "manifest_version": 3,
  "version": "1.5",
  "name": "__MSG_extName__",
  "description": "__MSG_extDescription__",
  "default_locale": "en",
  "permissions": [
    "storage"
  ],
  "host_permissions": [
    "https://api.reverso.net/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "commands": {
    "toggle-subtitles": {
      "suggested_key": {
        "default": "Ctrl+Shift+L"
      },
      "description": "__MSG_cmdToggleSubtitles__"
    },
    "toggle-pause": {
      "suggested_key": {
        "default": "Ctrl+Shift+K"
      },
      "description": "__MSG_cmdTogglePause__"
    },
    "toggle-alternatives": {
      "suggested_key": {
        "default": "Ctrl+Shift+Y"
      },
      "description": "__MSG_cmdToggleAlternatives__"
    },
    "toggle-examples": {
      "suggested_key": {
        "default": "Ctrl+Shift+E"
      },
      "description": "__MSG_cmdToggleExamples__"
    },
    "toggle-tts": {
      "description": "__MSG_cmdToggleTts__"
    }
  },
  "options_page": "options.html",
  "author": "Vasili Korol",
  "homepage_url": "https://sublern.pro",
  "action": {
    "default_popup": "options.html",
    "default_title": "__MSG_extName__",
    "default_icon": {
      "16": "icons/icon16.png",
      "32": "icons/icon32.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "translate.js",
        "subtitles.js",
        "overlay.js"
      ],
      "run_at": "document_idle",
      "all_frames": true
    }
  ],
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "options_ui": {
    "page": "options.html",
    "open_in_tab": true
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "sublern@sublern.pro",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "websiteContent"
        ],
        "optional": [
          "technicalAndInteraction"
        ]
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  }
}