Here is what I see. see screenshot Maybe I'm wrong, but I do recall seeing an option to check if you want the bar to permanently show. The option is there in Waterfox, but not Firefox. Someone closer to dev can chime in with a possible tweak in the about:config page.

Start Firefox in Troubleshoot Mode to check if one of the extensions ("3-bar" menu button or Tools -> Add-ons -> Extensions) or if hardware acceleration or if userChrome.css/userContent.css is causing the problem.

• switch to the Default System theme: "3-bar" menu button or Tools -> Add-ons -> Themes
• do NOT click the "Refresh Firefox" button on the Troubleshoot Mode start window

• https://support.mozilla.org/en-US/kb/diagnose-firefox-issues-using-troubleshoot-mode
• https://support.mozilla.org/en-US/kb/troubleshoot-extensions-themes-to-fix-problems

You can try Firefox from the official Mozilla server if you currently use a version from the repositories of your Linux distribution to see if it behaves differently.

• https://www.mozilla.org/en-US/firefox/all/#product-desktop-release

Just got the upgrade to FF 115.12.0esr from openSuse and the URL is back. All is good. Thanks for your responses.

Mark is as resolved and have a nice day.