Examine source code of HSverify

{
  "description": "A way to fight against service impersonations in the TOR network",
  "manifest_version": 2,
  "name": "HSverify",
  "version": "0.1.1resigned1",
  "homepage_url": "https://github.com/arrase/TOR-Hidden-Service-Verification",
  "icons": {
    "48": "icons/default48.png"
  },
  "applications": {
    "gecko": {
      "id": "arrase@gmail.com",
      "strict_min_version": "45.0"
    }
  },
  "permissions": [
    "activeTab",
    "tabs",
    "notifications",
    "storage"
  ],
  "browser_action": {
    "default_icon": "icons/default32.png",
    "default_title": "HSverify"
  },
  "background": {
    "scripts": [
      "background/background.js"
    ]
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.onion/*"
      ],
      "js": [
        "vendor/openpgp.min.js",
        "vendor/jquery-3.1.1.min.js",
        "content_scripts/hsverify.js"
      ]
    }
  ]
}