You should be able to delete those urls you don't want by using the down arrow key arrow to reach them. Then hit the Delete key on your keyboard. Or Shift+Delete key if that doesn't work.

To remove the Search bar, read this article: https://support.mozilla.org/en-US/kb/customize-firefox-controls-buttons-and-toolbars

Once you open the Customize box, click & drag the Search box inside the bigger box below. Then click the Done button at the bottom. That should save the changes.

Dear and respected NoahSUMO,

First and foremost thank you for your help, but unfortunately on my part at firefox 130.0 no combination of shift delete or delete button is self is working and giving desired results and you put a hyperlink in the previous answer to remove search bar which is a far cry for what i want my firefox to look and that is included with the search bar only difference i want to be visible and doable is that you can move stuff i.e URL addresses from URL bar without firefix filling em up again with some random site address i want it like it was while ago let say for example if i had 7 addresses in URL bar and decided to remove the number seven for which ever reason common reason suggests that if that action is performed there should be only 6 addresses left not firefox on it's own without permission adding some random page to place number 7 again ,if i had messed around the and fiddled with setting than i would completely understand that odd,strange,annoying occurrence but i haven't changed anything im settting in any tab for ages and it worked and look find until stupid screw up of FF 130