It works as expected, but after a delay: when I close a tab, at first it skips to the tab Firefox would have switched to by default and after a moment to the one determined by the add-on setting. It's confusing.

GOOD！！！！！！！！！

It does exactly what I want it to do - open new tabs or duplicate tabs at the far right rather than next to the open tab I'm in. Thank you very much!

jestem zadowolony

"Activate left after close" doesn't work at all.
"Open new to the right" works unreliably.

Working solution is combination of "Open Tabs Next to Current" and "Select After Closing Current".
Though using 2 extensions to cover basic tabs customization is ridiculous, of course... :(

設定After close, Change to left Tab不起作用.書簽欄一次打開多個分頁.順序會顛倒
Set After close, Change to left Tab does not work. Bookmarks bar opens multiple tabs at once. The order is reversed.

Doesn't seem to work. Set it to open new tabs last but it doesn't.

GOOD!
Is it possible to add a option as "After Close Tab, Chage to last unread tab of source tab"?

Cool! It works! I prefer Open -> Right, Close -> Left and it does! I hate the default! Thanks!

outstanding ! exactly what I wanted :-D

dont realy work!

I'm using this in conjunction with the 'Tree Style Tab' extension because that one adds some new tab behavior and not all the options to change it to my liking. Hence some other extension was needed that got me back the functionality I had with 'Tab Mix Plus' in versions <=56 of the browser (After Close, Change to Last Active Tab). It also does not appear to interfere with the grouped tree behavior when opening tabs. All in all, I'm happy with it.

Edit: if there was one thing to criticize then it's to make the extension page on AMO more user-friendly. Add a more detailed description, maybe create a graphic/modified screenshot to illustrate the changes that are possible. I don't need any of this, but for the average user it would undoubtedly help

It simply allows me to open and close tabs the way I like them. For me it's open link to tab at right and upon close to referring tab or last open one.

Simple and gives me control over the most annoying default tab behaviors so they work within my workflow. If you would add undo last closed tab it would be perfect.

Спасибо!!!

Thank you so much for the BTW tips!!