Go to any site (eg weather). In hamburger menu (bottom right) select Add To Home Screen. Launch Firefox using that Home Screen icon.

Install Onetab

See https://firefox-source-docs.mozilla.org/browser/tabunloader/

You're still using the previous user name? ... otherwise problematic.

SmartTubeNext

Create a cookie exception (to prevent deletion)
When accessing a site you’d (from address bar/^i) open permissions and specifically ALLOW cookies for that site.

What addons in use? Is "Studies" on?

https://lemmy.ml/feeds/c/firefox.xml?sort=Active

See "Manage Exceptions" (Privacy in Settings).
Typically, when accessing an "exception web page" you'd (from address bar/^i) open permissions and specifically ALLOW cookies for that site.

Fix prob available Mon according to employee engaged on it

Could be usefull at the very least as a history trail (as "History" proper is bloated with garbage, unfortunately)

In settings you may have requested "personalised recommendations"