It works perfectly, does exactly what I needed it to do. The developer is extremely responsive to issues and suggestions. I can't rate this extension highly enough! Very recommended.

I do not know if this it's possible with Firefox itself, but it would be awesome if I can just quickly hide just one tab.

Hey, dev, I want to report a bug, let's suppose that when I hide my tabs, a new Google tab opens, I have a problem where when I do that and I come back to my tabs, the Google tab duplicate it self in my hidden tabs and in my "secondary" tabs.

Exactly what I was looking for! Again, would love it if I could hide all tabs except my current active tab.

Awesome extension! The only one presented that doesn't close the hidden tabs, namely, hides them, so when you exit the "hidden" mode, tabs aren't loaded again, which is very convenient if you are surfing under a slow proxy and each page load takes a long time. In "hidden" mode, the tab may continue to load.
The only thing missing for happiness is a hotkey. And if there is an opportunity to configure the hotkey as you wish, for example, to scroll (SMB) double-click or to simultaneously click LMB and RMB - there would be aabsolutely amazing! And to open in the "hidden" mode the "necessary" tab instead of an empty one - I don’t dare to dream about this!

Отличное расширение! Единственное из представленных, которое не закрывает скрываемые вкладки, а именно скрывает, поэтому при выходе из "скрытого" режима они не загружаются снова, что очень удобно, если сидишь под медленным прокси и каждая загрузка страницы занимает продолжительное время. В "скрытом" режиме вкладка может продолжать загружаться.
Единственное, чего не хватает для счастья - это хоткея. А уж если будет возможность настроить хоткей по своему желанию, например на двойной клик ролика или на одновременный клик LMB и RMB - был бы вообще космос! А уж открывать в "скрытом" режиме "нужную" вкладку вместо пустой - это вообще космос!

Hides the tabs in the top tab bar (doesn't hide pinned tabs), opens a temporary new tab. FF displays a message that tabs have been hidden (have to click anywhere again to hide that). Shows the number of hidden tabs on the icon. Restores in the correct order, removes the temporary new tab.
Doesn't hide the top tab BAR which is what I am looking for - FEATURE REQUEST ("support" page had nothing about this addon)
Doesn't hide sidebar tabs which is good.
Dev-you will get more stars if you say all this on your addon description so users don't waste their time finding your addon does not do what they want. :(