Examine source code of nemoWeb

{
  "manifest_version": 2,
  "name": "nemoWeb",
  "version": "1.2",
  "description": "Amélioration ergonomique de Nemo Web",
  "icons": {
    "48": "icons/logo-nemoweb-48.png"
  },
  "content_scripts": [
    {
      "matches": [
        "*://*.wnemo.fr/*"
      ],
      "js": [
        "content.js"
      ],
      "css": [
        "content.css"
      ]
    }
  ]
}