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manifest.json
{
  "update_url": "https://clients2.google.com/service/update2/crx",
  "name": "Mute Tab",
  "version": "1.2.0",
  "description": "Convenient and fast to 'Mute Tab'",
  "background": {
    "service_worker": "background/service-worker.js"
  },
  "permissions": [
    "activeTab",
    "contextMenus",
    "storage"
  ],
  "icons": {
    "16": "images/16_u.png",
    "48": "images/48_u.png",
    "128": "images/128_u.png"
  },
  "action": {
    "default_title": "Mute Tab Extension",
    "default_popup": "popup/popup.html",
    "default_icon": {
      "16": "images/16_u.png",
      "48": "images/48_u.png",
      "128": "images/128_u.png"
    }
  },
  "commands": {
    "toggle-mute": {
      "suggested_key": {
        "default": "Ctrl+T",
        "mac": "Command+T"
      },
      "description": "Toggle mute/unmute for the current tab"
    }
  },
  "web_accessible_resources": [
    {
      "resources": [
        "images/*.png"
      ],
      "matches": [
        "<all_urls>"
      ]
    }
  ],
  "manifest_version": 3
}