Examine source code of ImmoProfits

{
  "manifest_version": 2,
  "name": "ImmoProfits",
  "version": "1.0.4",
  "description": "Estimation instantanée de l'intérêt d'un projet immobilier locatif (analyse/intérêt de la commune, rendement brut, net, score) sur les sites d'annonces immobilières.",
  "applications": {
    "gecko": {
      "id": "Immoprofits@Immoprofits.fr"
    }
  },
  "permissions": [
    "storage",
    "notifications",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "page_action": {
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "all_frames": true,
      "js": [
        "inject.js"
      ],
      "matches": [
        "https://*.leboncoin.fr/*"
      ]
    },
    {
      "all_frames": true,
      "js": [
        "injectsl.js"
      ],
      "matches": [
        "*://*.seloger.com/*"
      ],
      "run_at": "document_start"
    },
    {
      "all_frames": true,
      "js": [
        "content2.js"
      ],
      "matches": [
        "http://localhost/*",
        "*://www.immoprofits.fr/*"
      ]
    }
  ],
  "web_accessible_resources": [
    "injected.js",
    "injectedsl.js"
  ],
  "browser_action": {
    "default_icon": {
      "16": "icon16.png",
      "32": "icon32.png",
      "48": "icon48.png",
      "128": "icon128.png"
    },
    "default_popup": "popup.html",
    "default_title": "Immo Profits"
  },
  "icons": {
    "16": "icon16.png",
    "32": "icon32.png",
    "48": "icon48.png",
    "128": "icon128.png"
  }
}