Examine source code of Chronic Save

{
  "manifest_version": 2,
  "name": "Chronic Save",
  "version": "1.0",
  "description": "Advanced chronic features.",
  "icons": {
    "48": "brain_icon.svg"
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "content.js"
      ]
    },
    {
      "matches": [
        "https://extensionpay.com/*"
      ],
      "js": [
        "extpay_content.js"
      ],
      "run_at": "document_start"
    }
  ],
  "permissions": [
    "activeTab",
    "storage"
  ],
  "browser_action": {
    "default_icon": "brain_icon.svg",
    "default_title": "Chronic Save",
    "default_popup": "popup.html"
  },
  "background": {
    "page": "background.html",
    "persistent": false
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "ChronicSave@save.com"
    }
  }
}