Examine source code of Nitter Redirectx

{
  "name": "Nitter Redirect",
  "description": "Redirects x.com/twitter.com links to Nitter",
  "version": "1.1",
  "manifest_version": 2,
  "background": {
    "scripts": [
      "nitter-redirect.js"
    ]
  },
  "options_ui": {
    "page": "options.html"
  },
  "icons": {
    "48": "i48.png",
    "128": "i128.png"
  },
  "permissions": [
    "webRequest",
    "webRequestBlocking",
    "storage",
    "*://*.x.com/*",
    "*://*.twitter.com/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{0486374e-8515-4530-af07-6d8472a352ed}"
    }
  }
}