There are other tab behvaiors that TabMixPlus offers including going to the last used tab on close, open in foreground tab in the context menu for links, scroll wheel to cycle through tabs, and some other things I take for granted and then get disoriented when I use FF57.
Without those, it's painful. I will stick to the older Firefox (or maybe an alternative like Waterfox) until it becomes impossible to use new sites with it, or if somebody (myself included) reimplements these features in a way compatible with FF57.
This is the single most infuriating thing for me and I just don't understand why this is not a standard option, especially since it works perfectly fine by default on Chrome!
Probably because it's used for scrolling the tab strip when the amount of tabs is so high that their width stops shrinking and further overflowing tabs are clipped from the strip area.
Without those, it's painful. I will stick to the older Firefox (or maybe an alternative like Waterfox) until it becomes impossible to use new sites with it, or if somebody (myself included) reimplements these features in a way compatible with FF57.