How to delete history

How can I delete search history? I have a few misspelled searches and similar old stuff that pops up in the address bar when I type in a new search. I have tried several things: * Settings → Privacy & Security → Clear data → Selecting and marking everything but with no effect whatsoever * Settings → Privacy & Security → History → Firefox will never remember history + Clear history as mentioned above * Settings → Search → Search suggestions → everything disabled * Settings → Search → Address bar → everything but Bookmarks have been disabled * Deleted my old Firefox account and created a new so I can still sync between 2 computers Example: Previously I used www.adobe.com but now I use www.adobe.dk. But everytime I enter ''adobe'' in the address bar, Firefox keeps suggesting (autofill) adobe.com instead adobe.dk. Any suggestions how to clear/delete the browser/search history so I can get a fresh start?