Great ! Works like a charm with a ton of options to customise to one's liking, thank you

It was hard for me, to find out how it works. It would have been easier, it the column "relation" were on the left position und the column "Positon" were right of it. So I would have known, that Relation is the main criteria.
If you add some examples to the description, the configuration would be much easier, to understand.
With a better description I would have rated 5 stars.

一直在找关闭后打开左侧标签页，好不容易找到了，作者应该优化下插件的关键词，不容易被搜到

A must have add-on! I don't know why this feature + "New tab" in the context menu + "open new tab" to the right of selected tab doesn't exist by default in Firefox! Thank you to the developer!

Great. But is there a documentation??

太赞了. tabMix 不能用后一直在找类似扩展, 本来都已经死心了, 今天无意间找到这个, 太惊喜了.
必须五星好评

The only tab-closing add-on I know that provides options and actually works!

Супер дополнение! Лучше чем TST Focus Preceding Tab On Close, пользовался ним ранее. В этом дополнении нет бага с кратким переходом на правую вкладку и только потом на левую, сразу переходит куда нужно. + отличная идея - сначала переходить на предыдущую вкладку потом на левую и когда закончились на правую. Огромная благодарность автору, удачи Вам!

This addon did exactly what I expected! thank you!
非常感謝!這套件太神了!

非常好的扩展，但是稍有不足，是否能有如下操作：
1 当前浏览器标签页A
2 点击标签页A里的任何链接a1，a2，a3....并且是按顺序紧靠A右边后台打开，此时A（前台），a1.a2.a3都是后台未读状态（子标签页）。
3 切换至a1（前台）点击里面任何相同或不同域名的链接aa1前台打开浏览（孙标签页或其他网站），此时a2.a3仍旧是后台未读状态。
4 浏览完aa1（孙标签页或其他网站）后关闭该标签页或其他网站后自动切换至a1（子标签页），此时a2.a3仍旧是后台未读状态。
5 关闭a1（子标签页）后自动切换至a2（子标签页），此时a3仍旧是后台未读状态。
6 如上类似操作浏览完全部a2，a3，a4...关闭后自动切换至父标签页A。
上述的操作只有旧版的tab_utilities_fixed能够做到(1 关闭选取未读亲属标签页，2 上次选取的标签页）。希望能更加完善。谢谢！

Great addon!
Bug: when I try (using address bar) to select the tab that is already opened (by entering url or name of opened tab to the address bar), I'm switched to the last selected tab instead of switching to the tab that I've selected in the address bar.

steps:
1. open any site
2. in separate tab open another site
3. switch to the tab from step 2
4. create new tab and start typing (in address bar) url or name of the tab from step 1
5. select tab from step 1 in the list of suggestions (in address bar) and click on it or press enter

actual result: I'm switched to the tab from step 2
expected result: I should be switched to the tab from step 1 (as I've selected it in the address bar)

Choosing Last accessed tab and Skip hidden works great most of the time. It goes back to the previous active tab without reloading it. Seems like this should be the default Firefox behavior, but isn't for some reason. Skip hidden is needed with the Simple Tab Groups add-on to avoid switching tab groups unexpectedly.
Bug: In FF 65, select Left tab doesn't work if the browser has just been started. It always defaults to the right tab.