Examine source code of BDS Helper

{
  "manifest_version": 2,
  "name": "BDS Helper",
  "short_name": "BDS Helper",
  "version": "1.0.3",
  "author": "Muzzammil Mehdi",
  "homepage_url": "https://github.com/muzilos/BDS-firefox-extension",
  "description": "Offers helpful functions to aid in the shopping experience.",
  "icons": {
    "48": "icons/1f6d2-48.png"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "./wordMap.js",
        "./substitute.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "strict_min_version": "52.0a1",
      "id": "{ab3fc89e-559c-4154-8489-87677f55952d}"
    }
  },
  "permissions": [
    "webRequest",
    "*://en.wikipedia.org/*"
  ]
}