Hi

That configuration preference was only left in for testing purposes and has now been removed.

We do review the design of Firefox, but in the meantime, you can use https://color.firefox.com/ to customise your experience.

Hi Seburo

The biggest issues are the "bubble" style tabs and the crazy extra spacing between folder bookmarks etc. There is nothing in that theme selection that is remotely professional or tidy looking either, but thank you for suggesting it - maybe something decent (subjective, of course) will be added in time.

I don't mind change and some people will love it and some will hate it, but one of the things I always loved about Firefox was the choice. Removing options to disable styling that is subjectively good/awful is not something that sounds like a traditional Firefox decision - moreso a Chrome "you'll take and you'll like it" decision. Really not a good feeling for the first time in years for me with Firefox.

Anyway, thank you for your reply. I really hope the developers decide to add the option to forego this redesign style in a future update so those that like it can keep it and those that loathe it can ditch it.

You need to use a file userChrome.css. I'll posts some links separately because they will be moderated which could take time.

Here are some links. https://www.userchrome.org/how-create-userchrome-css.html other useful information: https://github.com/MrOtherGuy/firefox-csshacks http://www.userchrome.org/firefox-89-styling-proton-ui.html For the following, right-click the button labelled 'Raw' and select "Save Link As". The last page addresses an issue already covered by the previous link. The second is only necessary if you use the menubar. https://github.com/MrOtherGuy/firefox-csshacks/blob/master/chrome/tabs_on_bottom.css https://github.com/MrOtherGuy/firefox-csshacks/blob/master/chrome/tabs_on_bottom_menubar_on_top_patch.css https://github.com/MrOtherGuy/firefox-csshacks/blob/master/chrome/non_floating_sharp_tabs.css

In Firefox 91+ you can no longer disable Proton via "browser.proton.enabled = false" on the about:config page. Best is to leave browser.proton.enabled at its default value true as this pref still has effect.

Hi Seburo The biggest issues are the "bubble" style tabs and the crazy extra spacing between folder bookmarks etc. There is nothing in that theme selection that is remotely professional or tidy looking either, but thank you for suggesting it - maybe something decent (subjective, of course) will be added in time. I don't mind change and some people will love it and some will hate it, but one of the things I always loved about Firefox was the choice. Removing options to disable styling that is subjectively good/awful is not something that sounds like a traditional Firefox decision - moreso a Chrome "you'll take and you'll like it" decision. Really not a good feeling for the first time in years for me with Firefox. Anyway, thank you for your reply. I really hope the developers decide to add the option to forego this redesign style in a future update so those that like it can keep it and those that loathe it can ditch it.

Can't +1 this enough. Sure, now that the config value does not solve this we can apply css hacks or other extra hoops as a workaround, but this decision making process makes even me - a long time (15+ years) Firefox user - question my browser preferences.

The main issue for me is the crazy double spacing in the bookmarks menu. Do people really want to have to scroll to reach bookmarks which previously were visible in the menu?

I have fixed this with TerryN21's solution, but it simply shouldn't have been necessary to do this.

Please, please , please restore single-spacing in the menu lists.