Hi, I'm on Windows, so I'm not sure what colors are you getting in your address bar on MacOS.

When I click, mine goes from a grayish background to a white background with white-on-blue selected text.

I assume you are using the default "System" theme. What colors are you seeing? Or if you are using a different theme, please mention that.

More info on switching themes: Built-in themes in Firefox - alternative to complete themes

Thanks for the reply. I'm using 'Alpen'. It shows white then when click to type in and address it turns black/magenta, including a drop-down menu od suggeted sites.

Does this reply join the 'queue' in main page of replies?

Thanks, John

Hi John, there are a few different question lists, and they are all in "most recently updated" order.

I see what you mean about the address bar color -- and the address bar drop-down color -- with that theme. Theme authors can apply very different colors to different parts of the toolbars, but there's no easy way for us to modify them after installation. (There is a hard way, which is to apply our own style rules using a userChrome.css file. I'll skip over that for the moment.)

Maybe it would be simpler to shop for a new theme over on the Add-ons site? https://addons.mozilla.org/firefox/themes/