https://ucor.com/qas-users-should-not-operate-in-multiple-browser-windows/
QAS users should not operate in multiple browser windows - UCOR
Dec 10, 2025 - If you are a Quality Assurance System (QAS) user, please refrain from operating the system in multiple browser windows or tabs simultaneously.
multiple browser windowsshould notqasusersoperate
https://bugzilla.mozilla.org/show_bug.cgi?id=1057265
1057265 - browser opens with multiple windows
RESOLVED (nobody) in Firefox - Untriaged. Last updated 2016-01-06.
multiple windowsbrowseropens