Examine source code of 1Page

{
  "version": "1.0.0",
  "name": "1Page",
  "description": "1Page",
  "permissions": [
    "tabs",
    "activeTab",
    "contextMenus",
    "webNavigation",
    "scripting",
    "unlimitedStorage"
  ],
  "background": {
    "scripts": [
      "background.js",
      "background2.js"
    ],
    "persistent": true
  },
  "content_scripts": [
    {
      "js": [
        "content.js"
      ],
      "matches": [
        "<all_urls>"
      ],
      "run_at": "document_end",
      "exclude_matches": [
        "https://app.get1page.com/*"
      ]
    }
  ],
  "web_accessible_resources": [
    "https://app.get1page.com/static/media/logo.bb505ab9a20897d1dbdb.png",
    "iframe.html",
    "index.html",
    "contact.html",
    "entity.html",
    "flip.png"
  ],
  "browser_action": {},
  "icons": {
    "128": "1page.png"
  },
  "manifest_version": 2,
  "browser_specific_settings": {
    "gecko": {
      "id": "{17c5c89d-4234-4bfa-b924-a65398c55094}"
    }
  }
}