manifest.json

{
    "manifest_version": 2,
    "name": "Audio Transcription",
    "version": "1.0",
    "description": "Transcribe audio from any webpage.",
    "permissions": [
      "storage",
      "activeTab",
      "<all_urls>"
    ],
    "background": {
      "scripts": ["background.js"],
      "persistent": false
    },
    "browser_action": {
      "default_popup": "popup.html",
      "default_icon": "icon128.png"
    },
    "icons": {
        "128":"icon128.png"
        },
    "content_scripts": [
      {
        "matches": ["<all_urls>"],
        "js": ["content.js"]
      }
    ]
  }