Multi-language Audio Select for Videos

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "Multi-language Audio Select for Videos",
  "short_name": "Video Language Select",
  "version": "1",
  "manifest_version": 2,
  "description": "Audio track select for multi-language videos.",
  "permissions": [
    "contextMenus",
    "tabs",
    "activeTab",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "content.js"
    ],
    "persistent": false
  },
  "icons": {
    "16": "icon16.png",
    "48": "icon48.png",
    "128": "icon128.png"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "run_at": "document_idle",
      "js": [
        "languages.js"
      ]
    }
  ]
}