Examine source code of Secuba URL Extension

{
  "applications": {
    "gecko": {
      "id": "{3504e4b6-c253-4cac-8f54-893fe84ae8b7}"
    }
  },
  "manifest_version": 2,
  "author": "Secuba sp. z o.o.",
  "name": "Secuba URL Extension",
  "description": "Secuba URL Extension",
  "version": "1.5resigned1",
  "icons": {
    "16": "secuba16.png",
    "48": "secuba48.png",
    "128": "secuba128.png"
  },
  "permissions": [
    "tabs"
  ],
  "content_scripts": [
    {
      "js": [
        "main.js"
      ],
      "matches": [
        "*://*/*"
      ]
    }
  ]
}