Φόρουμ υποστήριξης - Firefox

I have open half a dozen or so tabs related to one subject. I would like to put them all into one "super tab", such that only the super tab shows as an open tab. Then, by clicking on that tab, it would show the tabs within it, any one or more of which could be selected. Is this possible, and if so how is it done? Perhaps there's an add-on or extension that would do this.

I have already created a multi-tab bookmark that sorta, maybe accomplishes the same thing. But it's not as convenient as what I envision as described above.

Thanks for any advice or words of wisdom.

Just recently Firefox started to display a "Loading..." message in the middle of every page I go to in Breitbart.com (doesn't happen in any other website).

It appears about 2 seconds AFTER the page loads or press F5. The background goes dark suggesting it's modal. It lasts for about 1 second and then goes away and everything appears normal.

I've been told this is a Cloudflare anti-DDoS CDN protocol issue, but I'm not so sure of that.

I've started up in Clean Mode and get the same behavior.

TIA