Examine source code of FreshRSS-Notify

{
  "name": "FreshRSS-Notify",
  "description": "Alert new unreads feeds",
  "version": "3.1.1",
  "author": "Purexo (https://purexo.mom/)",
  "homepage_url": "https://github.com/Purexo/FreshRSS-Notify#readme",
  "browser_specific_settings": {
    "gecko": {
      "id": "freshrss-notify@purexo.mom"
    }
  },
  "manifest_version": 2,
  "default_locale": "en",
  "icons": {
    "64": "Assets/img/icon.png"
  },
  "permissions": [
    "<all_urls>",
    "storage",
    "alarms",
    "notifications"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": "Assets/img/icon.png",
    "default_title": "FreshRSS Notify",
    "default_popup": "front/panel/index.html",
    "browser_style": false
  },
  "options_ui": {
    "page": "front/options/index.html",
    "open_in_tab": true
  }
}