Yes

even today works well

Works great, really helpful if you have Firefox set to remember tabs on open but you still want the option for a fresh session.

Wonderful! Does what it should - incl. explicite preferences = would be great if you build in icons in other colours as on black background the addon-icon could not be recognized!

Nicely done! It even closes all the tabs in private browsing windows. Yes, it would be great to have it in the address bar!

Works the way it is suppose to.