doesn't work after wake up from hibernate

Doesn't work reliably. When works, results in noticeable flickering(*).
(*) I suspect that it's because it allows "default" tab selection to be done first.

"Select After Closing Current" seems to be a better choice: works reliably so far and flickering is less(*)
(*) though it also seems to be not able to completely prevent default tab selection

Did exactly what it was supposed to. One of the functions I used from Tab Mix Plus which is being nixed in FF57. Thanks!

Edit March 2018: It still works, but I have to disable and then re-enable the addon each time I start Firefox. ANd sometimes it hovers on the right window before switching to the left.
I mentioned this on their github site but no response in months. Shame. 5 star down to 2.