Examine source code of provided RSS

{
  "manifest_version": 2,
  "name": "Feedly Notifier (manual polling)",
  "version": "1.0.0",
  "description": "Monitor user-provided RSS/Atom feeds, poll periodically, show unread counts and notify on new items.",
  "permissions": [
    "storage",
    "alarms",
    "notifications",
    "activeTab",
    "tabs",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "browser_action": {
    "default_title": "Feedly Notifier",
    "default_popup": "popup/popup.html"
  },
  "options_ui": {
    "page": "options/options.html",
    "open_in_tab": false
  },
  "web_accessible_resources": [],
  "applications": {
    "gecko": {
      "id": "feedlynotifier@example.com",
      "strict_min_version": "60.0"
    }
  }
}