Examine source code of Jobboard Master

{
  "description": "An extension to help you nail your next remote job",
  "version": "1.0.0",
  "name": "Jobboard Master",
  "browser_action": {
    "default_popup": "popup.html"
  },
  "icons": {
    "32": "icon-32.png",
    "120": "icon-120.png"
  },
  "content_scripts": [
    {
      "matches": [
        "https://remoteok.io/*",
        "https://weworkremotely.com/*"
      ],
      "js": [
        "contentScript.bundle.js"
      ]
    }
  ],
  "web_accessible_resources": [
    "icon-32.png",
    "icon-120.png"
  ],
  "permissions": [
    "storage",
    "tabs"
  ],
  "manifest_version": 2,
  "content_security_policy": "script-src 'self';object-src 'self'",
  "applications": {
    "gecko": {
      "id": "martinratinaud@gmail.com_jobboard-master"
    }
  }
}