Just tested it again. Shift+Delete works but Delete alone not. Perhaps it was changed since last time

I am using Linux, not sure if that makes any differrence.

the official method seems to be shift + delete

https://support.mozilla.org/en-US/kb/remove-websites-address-bar-suggestions?redirectslug=remove-websites-awesome-bar-suggestions&redirectlocale=en-US

Same but I just press delete instead of shift + backspace

U still have to pay 25 usd to play it though

I didnt even bother installing their stupid mobile appbto seeNSFW content

For small shrimp yes to save time but for larger shrimps no