Examine source code of KanbanFlow+

{
  "manifest_version": 2,
  "name": "KanbanFlow+",
  "version": "0.1",
  "description": "Adds small utilities and interface improvements to KanbanFlow boards",
  "author": "Iván Barcia",
  "content_scripts": [
    {
      "matches": [
        "https://kanbanflow.com/board/*"
      ],
      "js": [
        "main.js"
      ]
    }
  ],
  "icons": {
    "16": "icon-16w.png",
    "48": "icon-48w.png",
    "128": "icon-128w.png"
  }
}