Examine source code of No Doom Scrolling

{
  "manifest_version": 2,
  "name": "No Doom Scrolling",
  "version": "1.0",
  "description": "An extension that allows the user to disable infinite scrolling in every site, prompting them to either keep going or leaving the page.",
  "permissions": [
    "activeTab",
    "storage",
    "webRequest",
    "webRequestBlocking",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "icons": {
    "128": "icons/icon.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "{e8b2f5ef-561f-40bc-8c90-0f8023d9397d}"
    }
  }
}