User Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:80.0) Gecko/20100101 Firefox/80.0

Steps to reproduce:

Go to a pinned tab, type a new URL and press enter (or press the arrow on screen)

Actual results:

The pinned tab changes from the original site, to the URL I typed which is now pinned. So the original pinned tab is replaced.

Expected results:

Open a new tab with the URL, as this is not the pinned tab URL. Similar to the behaviour of pressing external (outside of the pinned tab URL domain) links: They also open in a new tab (which is great)

Oops sorry I did not see the duplicate.