Examine source code of FillEngine

{
  "manifest_version": 2,
  "name": "FillEngine",
  "version": "1.1.1",
  "description": "Extension intelligente pour remplir automatiquement les formulaires Google avec vos données CSV personnalisées",
  "author": "desire",
  "short_name": "FillEngine",
  "homepage_url": "https://github.com/lich-t/FillEngine_ff.git",
  "permissions": [
    "activeTab",
    "tabs",
    "storage",
    "https://docs.google.com/forms/*",
    "https://storage.googleapis.com/*"
  ],
  "background": {
    "scripts": [
      "background.js"
    ],
    "persistent": true
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "js": [
        "src/core/config.js",
        "src/core/pageDetector.js",
        "src/form/generateDictionary.js",
        "src/form/FormDetector.js",
        "src/form/FieldMatcher.js",
        "src/form/FieldFiller.js",
        "src/form/FormAutoFiller.js",
        "src/init/content-init.js"
      ],
      "run_at": "document_idle",
      "all_frames": true
    }
  ],
  "browser_action": {
    "default_popup": "popup.html",
    "default_title": "FillEngine",
    "default_icon": {
      "16": "public/icons/icon16.png",
      "48": "public/icons/icon48.png",
      "128": "public/icons/icon128.png"
    }
  },
  "icons": {
    "16": "public/icons/icon16.png",
    "48": "public/icons/icon48.png",
    "128": "public/icons/icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "fillengine@desiredevdev.com",
      "strict_min_version": "109.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    }
  }
}