Examine source code of JustAnime Sync

{
  "manifest_version": 3,
  "default_locale": "en",
  "name": "__MSG_extName__",
  "version": "1.15.0",
  "description": "__MSG_extDescription__",
  "homepage_url": "https://justanime.me",
  "permissions": [
    "storage",
    "identity",
    "alarms",
    "scripting"
  ],
  "host_permissions": [
    "*://*/*"
  ],
  "background": {
    "scripts": [
      "src/background.js"
    ],
    "type": "module"
  },
  "action": {
    "default_popup": "src/popup.html",
    "default_title": "__MSG_extName__",
    "default_icon": {
      "16": "icons/icon-16.png",
      "32": "icons/icon-32.png",
      "48": "icons/icon-48.png",
      "128": "icons/icon-128.png"
    }
  },
  "options_ui": {
    "page": "src/panel.html",
    "open_in_tab": true
  },
  "icons": {
    "16": "icons/icon-16.png",
    "32": "icons/icon-32.png",
    "48": "icons/icon-48.png",
    "128": "icons/icon-128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "sync@justanime.me",
      "strict_min_version": "115.0",
      "data_collection_permissions": {
        "required": [
          "websiteActivity",
          "websiteContent"
        ],
        "optional": [
          "technicalAndInteraction"
        ]
      }
    }
  }
}