Can't imagine life without this addon. Thank you so much. I have used it for years now!

Ok.

Please make it more visible, best make it look like an X.

Please make X icon

Button works just as described (Firefox 57.0.1).
It would be nice to have alternate button colors to improve visibility.

Thank you. very helpful, but can you make the icon look like X?

I just love having a Close Tab button at a fixed position in the browser. Thanks for making this :-)

for your great work to keep the toolbar buttons alive!