ClearURL (strips tracking elements from URLs)

If you use the “AdGuard URL Tracking Protection” under Privacy in uBlock Origin. Also add Actually Legitimate URL Shortener Tool & ClearURLs for uBo. You don’t need ClearURL.

You can add lists by going to Filter lists -> Import… at the bottom of the page -> C&P the URL in the box -> Apply Changes -> Done.

Multi Account Containers

You don’t need an extension for that, containers are built into FF.