Examine source code of Email Scraper

{
  "manifest_version": 2,
  "name": "Email Scraper",
  "version": "2.2",
  "description": "Scrape email addresses from the current page.",
  "permissions": [
    "tabs",
    "<all_urls>",
    "storage"
  ],
  "icons": {
    "48": "/icon.png"
  },
  "background": {
    "scripts": [
      "/background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "/content.js"
      ],
      "run_at": "document_idle"
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{ef4406c6-0ed2-4445-a35b-8b88b20c5aeb}"
    }
  },
  "browser_action": {
    "default_popup": "/popup.html",
    "default_title": "Email Scraper"
  },
  "author": "Rohan Yeole, https://rohanyeole.com"
}