Opening tabs in Brief 1.7 Rated 5 out of 5 stars

Brief 1.7 opens new tabs exactly in the same way normal webpages do. If you want the tab to open in the background, you may use middle-click or Ctrl+click.
Yes, it is a change. On the other hand, Brief now handles relative URLs correctly and works together with advanced tab-handling addons.

This review is for a previous version of the add-on (1.7.1-signed).  This user has other reviews of this add-on.