Bookmark hygiene, one entry only

Your Tor Browser bookmarks should have one bookmark for Nexus. Not five. Not one per mirror.

Bookmark the mirror reference page on this Bureau site (or wherever else you trust to keep the current signed rotation fresh). One entry. When you open the bookmark, you land on a page that lists the current mirrors, and you copy from there.

Do not bookmark individual onion addresses. Onion addresses rotate. A bookmark that points at an address the operator retired six months ago is a phishing risk if anyone happened to snap up the retired address (they usually do).

Reference-page bookmarks stay valid across rotations. Address bookmarks go stale. This is the difference between a bookmark that reads for years and one that fails as soon as the operator does their job.