Examine source code of Typeback – Recover Lost Text & Form Data

{
  "manifest_version": 3,
  "name": "__MSG_extName__",
  "short_name": "Typeback",
  "version": "0.1.2",
  "default_locale": "en",
  "description": "__MSG_extDescription__",
  "author": "Typeback",
  "browser_specific_settings": {
    "gecko": {
      "id": "typeback@typeback.app",
      "strict_min_version": "142.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      },
      "strict_min_version_android": "142.0"
    }
  },
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "permissions": [
    "storage",
    "contextMenus",
    "alarms"
  ],
  "background": {
    "scripts": [
      "src/background/service-worker.js"
    ],
    "type": "module"
  },
  "action": {
    "default_title": "__MSG_actionTitle__",
    "default_popup": "src/popup/popup.html",
    "default_icon": {
      "16": "icons/icon16.png",
      "32": "icons/icon32.png",
      "48": "icons/icon48.png",
      "128": "icons/icon128.png"
    }
  },
  "content_scripts": [
    {
      "matches": [
        "<all_urls>"
      ],
      "all_frames": true,
      "run_at": "document_idle",
      "js": [
        "src/content/sensitive.js",
        "src/content/fieldkey.js",
        "src/content/capture.js"
      ]
    }
  ],
  "commands": {
    "restore-last": {
      "suggested_key": {
        "default": "Alt+Shift+R",
        "mac": "Alt+Shift+R"
      },
      "description": "__MSG_cmdRestoreLast__"
    }
  }
}