Examine source code of FreshRssAlerts

{
  "manifest_version": 2,
  "name": "FreshRssAlerts",
  "version": "1.0",
  "author": "Bart Van Beurden",
  "description": "Provides alerts for Fresh RSS servers",
  "icons": {
    "256": "assets/logo.png"
  },
  "permissions": [
    "*://*/*",
    "webRequest",
    "storage",
    "notifications"
  ],
  "background": {
    "scripts": [
      "workers/index.js"
    ]
  },
  "browser_action": {
    "default_icon": "assets/logo.png",
    "default_title": "FreshRSS Alerts",
    "default_popup": "pages/popup/index.html"
  },
  "options_ui": {
    "page": "pages/options/index.html",
    "browser_style": true
  },
  "web_accessible_resources": [
    "assets/fonts/icomoon.ttf"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{e469be99-8542-4d64-9a16-688efdae1bd7}"
    }
  }
}