Checks > Periodic review > C-18
Operators rotate addresses to spread load and make sustained attacks harder to maintain. An address you saved a long time ago may simply have been retired, which looks identical from outside to an address that was never genuine.
Bookmark a source that publishes the current set rather than the individual addresses. A bookmark pointing at a retired onion is worse than none, because it trains you to open something that may no longer belong to the operator. A bookmark pointing at a maintained source survives every rotation.
A stale set is an inconvenience that becomes dangerous only in combination with the session items, particularly the address comparison on the login screen. Those items catch the failure. This one prevents you needing them to.
nexusb2l7fmqnefwphyy7m5zjhlkytlbo7qbb5lu5dlczr3azgii2gyd.onionnexusma2iqgauqqvjcgds4ckv5xbf272tkfagq4epojjhsgleqpwxiqd.onionnexusabcd6tyfhdwilyitaqiri6tisj2v2hueyjuj6qkvd6azvi5tuqd.onionRun C-07 before you type anything. Open in Tor Browser only, then compare the onion printed on the login screen against your browser address bar. A mismatch means the page is a copy and the tab should be closed.