I added Panorama Group Tabs and I don't like the way it works. I want to remove it but can't find or figure out a way to. Can you please tell me how it can be removed permanently? Thanks!

See:

• https://support.mozilla.com/kb/what-are-tab-groups

That link doesn't tell you how to remove the Panoroma Tab Groups!! My main issue with it is that along my tabs at the top I no longer have the tab to open a new tab. Instead I have to click on the tab groups and then open them and click on an open area in the tab to get a new tab opened!! Is there a way to add that? I don't see that when I go to customize the tool bar as there's no icon to add it, just one to open a new window, which I don't want to do!! Thanks!!