Examine source code of Nexusfontify

{
  "manifest_version": 2,
  "name": "Nexusfontify",
  "version": "1.0.3",
  "description": "Redirects font requests from Google Fonts to NexusFonts.",
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "http://*/*",
    "https://*/*"
  ],
  "background": {
    "scripts": [
      "dist/background.js"
    ],
    "persistent": false
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "dist/content.js"
      ]
    }
  ],
  "icons": {
    "48": "icons/fonts.svg"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{ff5579e0-69d8-4384-89a9-f8dd6d57cc72}"
    }
  }
}