Examine source code of kravat

{
  "manifest_version": 2,
  "name": "kravat",
  "description": "Finis la double saisie. Sauvegarde tes candidatures dans kravat directement depuis LinkedIn, Indeed, WTTJ et d'autres sites d'offres.",
  "version": "0.1.0",
  "icons": {
    "16": "icon/16.png",
    "48": "icon/48.png",
    "128": "icon/128.png"
  },
  "permissions": [
    "activeTab",
    "cookies",
    "storage",
    "scripting",
    "https://kravat.app/*"
  ],
  "browser_specific_settings": {
    "gecko": {
      "id": "extension@kravat.app",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "optional": [
          "technicalAndInteraction",
          "websiteContent"
        ]
      }
    }
  },
  "background": {
    "scripts": [
      "background.js"
    ]
  },
  "browser_action": {
    "default_title": "kravat",
    "default_popup": "popup.html"
  },
  "content_scripts": [
    {
      "matches": [
        "https://jobs.lever.co/*",
        "https://www.indeed.com/*",
        "https://www.indeed.fr/*",
        "https://www.jobteaser.com/*",
        "https://www.linkedin.com/jobs/*",
        "https://www.welcometothejungle.com/*"
      ],
      "run_at": "document_idle",
      "js": [
        "content-scripts/content.js"
      ]
    }
  ]
}