YouTube subtitles viewer

manifest.json

{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "description": "An extension to view, copy and search subtitles on YouTube, with every language",
  "version": "1.1.0",
  "name": "YouTube subtitles viewer",
  "background": {
    "page": "background.html",
    "persistent": false
  },
  "page_action": {
    "default_popup": "popup.html",
    "default_title": "Youtube subtitles viewer"
  },
  "permissions": [
    "tabs",
    "storage",
    "declarativeContent"
  ],
  "icons": {
    "16": "icon16.png",
    "48": "icon48.png",
    "128": "icon128.png",
    "256": "icon256.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://www.youtube.com/*",
        "*://youtube.com/*"
      ],
      "js": [
        "contentScript.bundle.js"
      ]
    }
  ],
  "commands": {
    "_execute_page_action": {
      "suggested_key": {
        "default": "Ctrl+Shift+K",
        "mac": "Command+Shift+K"
      }
    }
  },
  "web_accessible_resources": [
    "content.styles.css",
    "icon254.png",
    "icon128.png",
    "icon48.png",
    "icon16.png"
  ],
  "manifest_version": 2,
  "content_security_policy": "script-src 'self' 'unsafe-eval'; object-src 'self'"
}