Examine source code of Impede

{
  "manifest_version": 2,
  "name": "Impede",
  "author": "Nicholas Rishel",
  "version": "1.21",
  "description": "If you can't make what you want to do easy, make the things you shouldn't do hard!\n\nMake your life more intentional by breaking your addiction to time wasting websites. This Webextension adds \"activation energy\" to websites by having you solve simple math problems before viewing the page. This prevents the initial dopamine kick many of these websites exploit, allowing you to reevaluate whether you really want to be spending your time unproductively... and removing the guilt when the answer is \"yes\"!",
  "applications": {
    "gecko": {
      "id": "{5debceac-852f-4379-aaf6-5dce50be26b7}"
    }
  },
  "icons": {
    "48": "icons/icon-48.png",
    "96": "icons/icon-96.png"
  },
  "browser_action": {
    "default_icon": {
      "16": "icons/fast-16.png",
      "32": "icons/fast-32.png"
    }
  },
  "background": {
    "scripts": [
      "worddb.js",
      "blacklistdb.js",
      "nav.js",
      "blocktype.js",
      "blocking.js"
    ],
    "type": "module"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "impede.js"
      ],
      "css": [
        "impede.css"
      ],
      "run_at": "document_start"
    }
  ],
  "web_accessible_resources": [
    "words.txt"
  ],
  "options_ui": {
    "page": "options.html"
  },
  "permissions": [
    "storage",
    "tabs",
    "webNavigation",
    "notifications"
  ]
}