Hi, I recently switched from another mobile browser to firefox and overall I love it. However I hate that my private browsing tabs automatically close whenever I close the app. There is a support page for this issue however it seems to be out of date. I also saw a forum thread that seemed to say the feature was removed last year and then re-added a few months later. However it still is not working for me I've made sure I'm updated to the latest version I've searched the settings up and down and I'm not sure what to do.