This concerns the "about:config" setting, namely "browser.tabs.loadDivertedInBackground", which was available for configuration in earlier versions of Firefox Mobile for Android. The process is probably best described here, but the solution is out of reach: [https://androidflagship.com/34966-open-links-in-the-background-with-firefox-for-android/ Open Links in the Background with Firefox for Android] Please, advise me whether it is indeed still possible to achieve the desired result, and how to do so? Thank you.