I want this function back. I know opening too many tabs causes the browser to crash, but I solved that by only bookmarking 7 or 8 maximum sites per group. It is very handy to open up multiple webpages at once and cuts access time to the sites.
I, however, suggest an improvement to the groups. After a while, my groups list would get too long and I have to scroll to find them all. I suggest being able to put groups in named folders within the function and if that gets too full, then have the drop down menu open a continuation of itself in a second drop down list beside it like the windows system does.