Examine source code of Rencontre-Ados

{
  "manifest_version": 2,
  "version": "2.0.0",
  "author": "Johan Krn",
  "name": "Rencontre-Ados",
  "description": "Rencontre-Ados.fr",
  "icons": {
    "128": "images/logo.png"
  },
  "browser_action": {
    "default_icon": "images/inactive.png"
  },
  "background": {
    "scripts": [
      "javascript/script.js"
    ]
  },
  "permissions": [
    "https://rencontre-ados.fr/*",
    "tabs"
  ]
}