Examine source code of Audio Equalizer Memory

{
  "manifest_version": 2,
  "name": "Audio Equalizer Memory",
  "version": "1.0",
  "description": "Ghi nhớ cài đặt âm thanh (EQ) theo từng trang web.",
  "permissions": [
    "storage",
    "tabs",
    "<all_urls>"
  ],
  "browser_action": {
    "default_icon": "icon.png",
    "default_popup": "popup.html"
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "equalizer.js"
      ]
    }
  ],
  "icons": {
    "48": "icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{55ac38db-7610-4fb5-ab97-68c0f2b7bb62}"
    }
  }
}