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manifest.json

{
  "manifest_version": 2,
  "name": "video subtitle download addon",
  "description": "support: youtube; ",
  "version": "2025.6.4.1",
  "default_locale": "en",
  "browser_specific_settings": {
    "gecko": {
      "id": "video-subtitle-download@example.com"
    }
  },
  "permissions": [
    "notifications",
    "<all_urls>",
    "tabs",
    "webNavigation",
    "scripting",
    "menus",
    "storage",
    "unlimitedStorage",
    "downloads"
  ],
  "background": {
    "page": "background.html"
  },
  "icons": {
    "48": "icons/48.png"
  },
  "browser_action": {
    "default_icon": "icons/48.png",
    "default_title": "setting video subtitle download"
  },
  "page_action": {
    "default_icon": "icons/48.png",
    "show_matches": [
      "https://*.youtube.com/watch?v=*",
      "https://*.youtube.com/shorts/*",
      "https://vimeo.com/*"
    ]
  },
  "options_ui": {
    "page": "popup_browser_action.html",
    "open_in_tab": true
  }
}