Examine source code of ZXBarDecode

{
  "name": "ZXBarDecode",
  "version": "1.0.0",
  "description": "A Barcode decoder that uses zxing-js!",
  "homepage_url": "https://github.com/mz2212/ZXBarDecode",
  "manifest_version": 2,
  "minimum_chrome_version": "74",
  "applications": {
    "gecko": {
      "id": "zxbardecode@myon.xyz",
      "strict_min_version": "67.0"
    }
  },
  "icons": {
    "128": "128.png"
  },
  "permissions": [
    "storage",
    "menus",
    "activeTab",
    "clipboardWrite",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  }
}