Occasional detection in sandboxed environment

Very occasional detection at browser start and first video watched – this is purely to give information to the extension author so please don't join this thread unless your sandboxed conditions are the same:

• Mac Chrome Version 126.0.6478.183 (Official Build) (x86_64) – I use Brave as my daily driver, so Chrome is used for Youtube only
• Latest version of Fadblock with no other extensions loaded in Chrome
• A dedicated Google account for Youtube only.

As this is only happening very occasionally (perhaps once a week at most), signing out of the account, clearing all Chrome data and signing back in solves the issue with minimum fuss.

該 issue 描述了在沙盒化的 Chrome 環境中偶爾出現的偵測。首先檢查擴充功能的偵測規避邏輯，可能在內容腳本或背景 Service Worker 中。重現沙盒化設定：一個僅安裝 Fadblock 的乾淨 Chrome 設定檔，一個專用的 YouTube 帳戶。監控網路請求和擴充功能日誌，以確定觸發偵測的原因。'Done' 意味著理解偵測模式並提出修復方案。

由索引模型根據 Issue 內容生成。