Examine source code of Mozilla Events

{
  "manifest_version": 2,
  "name": "Mozilla Events",
  "version": "1.0.4resigned1",
  "description": "Addons For Mozilla event list",
  "icons": {
    "32": "icons/moz.png",
    "48": "icons/moz.png",
    "96": "icons/moz.png"
  },
  "author": "Hashemi Rafsan",
  "applications": {
    "gecko": {
      "id": "rafsan@freebuck.xyz",
      "strict_min_version": "42.0",
      "strict_max_version": "50.*"
    }
  },
  "homepage_url": "https://github.com/hashemirafsan/mozilla-event-reminder",
  "content_scripts": [
    {
      "matches": [
        "*://*/*"
      ],
      "js": [
        "reminder.js"
      ]
    }
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_icon": {
      "16": "icons/moz.png"
    }
  },
  "permissions": [
    "alarms",
    "*://*/*",
    "webRequest",
    "tabs"
  ]
}