Examine source code of deBrouF_Qasi

{
  "manifest_version": 2,
  "name": "deBrouF_Qasi",
  "version": "1.1",
  "description": "Crypte et décrypte du texte dans des images JPG via l'algorithme Brouf_PoP.",
  "author": "qasi_modo",
  "browser_specific_settings": {
    "gecko": {
      "id": "debrouf@qasi_modo",
      "strict_min_version": "91.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ],
        "description": "This extension does not collect any user data"
      }
    }
  },
  "permissions": [
    "storage",
    "contextMenus",
    "activeTab",
    "downloads",
    "<all_urls>"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": false
  },
  "browser_action": {
    "default_popup": "popup.html",
    "default_title": "BrouF by qasimodo"
  },
  "icons": {
    "48": "assets/icon48.png",
    "128": "assets/icon128.png"
  },
  "web_accessible_resources": [
    "assets/*"
  ],
  "content_security_policy": "script-src 'self'; object-src 'self'"
}