TLDR; we propose using Firefox.
Even though you cannot prevent detection of extensions completely (for now), it is still worth minimizing the risks. Why is it not possible? First, even if your extensions are not detected, websites could still detect a small fraction of them by testing your browsers behavior. Second, we know that many browsers are vulnerable to extensions detection. Here are some details:
It is easier to prevent web login detection: the best is to disable third-party cookies in your browser. But there are alternatives, you can also: