Examine source code of Costructor

{
  "manifest_version": 2,
  "name": "Costructor",
  "description": "Importez les articles de vos fournisseurs favoris dans vos devis Costructor en 1 clic.",
  "version": "1.1.55",
  "icons": {
    "16": "icon/16.png",
    "32": "icon/32.png",
    "48": "icon/48.png",
    "96": "icon/96.png",
    "128": "icon/128.png"
  },
  "permissions": [
    "storage"
  ],
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_title": "Costructor",
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "*://app.costructor.co/*",
        "*://costructor.localhost/*"
      ],
      "js": [
        "content-scripts/app.js"
      ]
    },
    {
      "matches": [
        "https://*/*"
      ],
      "css": [
        "content-scripts/content.css"
      ],
      "js": [
        "content-scripts/content.js"
      ]
    }
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "{8b389086-7d17-47d3-a1e9-d64c945878b0}"
    }
  }
}