Description of the need Do not open Backdrop CMS site in same window/tab instead of currently browsing site.

Proposed solution In the file core/modules/system/system.theme.inc line 13 instead: return '<span>' . t('Powered by <a href="@poweredby">Backdrop CMS</a>', array('@poweredby' => 'https://backdropcms.org')) . '</span>'; should be: return '<span>' . t('Powered by <a href="@poweredby" target="_blank">Backdrop CMS</a>', array('@poweredby' => 'https://backdropcms.org')) . '</span>';

(I am searching for issues using the word accessibility to mark as accessibility issues for an upcoming Sprint. It's not clear to me that this one would qualify. Please post a comment if you disagree. - @stpaultim 08/17/2021).

GitHub Link: 
https://github.com/backdrop/backdrop-issues/issues/4230
GitHub Issue #: 
4230