Examine source code of PayPerFax Tracker

{
  "manifest_version": 2,
  "name": "PayPerFax Tracker",
  "description": "Track your PayPerFax transmissions in real-time and view your complete fax history directly in your browser.",
  "version": "0.1.3",
  "icons": {
    "16": "icon/16.png",
    "32": "icon/32.png",
    "48": "icon/48.png",
    "96": "icon/96.png",
    "128": "icon/128.png"
  },
  "permissions": [
    "storage",
    "alarms",
    "https://*.payperfax.com/*",
    "https://payperfax.com/*"
  ],
  "externally_connectable": {
    "matches": [
      "https://*.payperfax.com/*"
    ]
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_title": "PayPerFax",
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "https://*.payperfax.com/*",
        "https://payperfax.com/*"
      ],
      "js": [
        "content-scripts/content.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{3025d594-1baa-42c2-b620-84db078b9d67}"
    }
  }
}