great add-on, but stopped working after update (add-on update date 01.08.18)

I have put add-on's icon on the tab bar. Hope this add-on can add a white icon option, to cope with browser's dark theme(even the embed default theme is with the dark tab bar).

Good addon that help to save time.
In future I hope to see URLs of every link in list, like URLs in statusbar when cursor is over links.
And please-please add a feature to save links list when browser was closed and opened again.
ps English is not my native language, so please be kind to my mistakes.

An sich ein gutes addon, aber das wir es brauchen, was eigentlich ein Funktion in Firefox sein sollte, ist sehr slecht!! Aber das ist nicht neu, da Firefox von Update zu Update schlechter wird. Nicht nur das: sehr viele (gute!) Add-ons sind in Version 57 nicht mehr zu gebrauchen.
Damit läufen immer mehr Firefox-Gebraucher weg..... Schade.
Ich wechsle jetzt auch zum Chrome-Browser! Steht schon seit längerer Zeit als erste in den Testen.

It's pretty good actually, The icon is clearly visible on any light or dark themes I have tested and it also uses the context menu design of the operating system.

The only downside - and also the reason why I'm uninstalling this again - is the lack of configuration options to set it up for my needs. I need to be able to open the list of recently closed tabs with the left mouse button, because in most cases I don't want to reopen the last closed tab. I'm not confident that I could learn to make an exception for this extension, when all others I use have to be operated with the left mouse button instead.

It's nice to be able to trigger two different actions depending on which mouse button is used, but with no way to configure the underlying action, this design decision goes against the grain of virtually all modern extensions. That's why I can only give four stars for an otherwise great and helpful tool.

would like more than 25

Performs as expected. On occasion, it seems like it opens a tab in a window that wasn't in focus, which throws me off sometimes. Otherwise, it more or less performs exactly as intended.