I usually browse in Private mode, so history of the tabs and addresses is not stored. I used to use CTRL+Z to recall any address that I had typed previously, or to restore the address of the tab that I accidentaly closed in the Private Mode. This used to work in FF 54 and older perfectly, and was one of the main reasons for me to not to switch to chrome, as I could recall everything that I had typed in the address bar, from any tab. From FF 55.0, with those changes in the address bar, this functionality is no longer working, and CTRL+Z only undo's the last one change in the address bar in the same tab, and stops after one Undo. How to enable multi step undo in address bar like previous Firefox versions, where I could recall anything that I had typed from any tab in Firefox by pressing CTRL+Z in the address bar.