Colour donload status in Toolbar

Bonjour

Firefox settings, preferences and other options https://support.mozilla.org/en-US/kb/firefox-options-preferences-and-settings Appearance, you can use themes to change the look of Firefox https://support.mozilla.org/en-US/kb/use-themes-change-look-of-firefox

@Agent virtuel, If it would be that easy I would not have asked. Cannot find where ....

Maybe

Introduction, please read, contributors guide on Firefox advanced customization with css https://support.mozilla.org/en-US/kb/contributors-guide-firefox-advanced-customization

A subject https://www.reddit.com/r/FirefoxCSS/comments/12e64pc/changing_download_progress_bar_color

Colors https://www.w3schools.com/colors/colors_picker.asp

If you wish to try userChrome.css

#downloads-indicator-progress-inner{ --toolbarbutton-icon-fill-attention: #ff8000; }

Copy/paste the code into your notepad Save Type: All files userChrome.css

Create a chrome folder Move userChrome.css to your chrome folder

Go to your profile folder https://support.mozilla.org/en-US/kb/profiles-where-firefox-stores-user-data#w_how-do-i-find-my-profile

Move your chrome folder to your profile folder

Go to configuration editor https://support.mozilla.org/en-US/kb/about-config-editor-firefox Enter a search term toolkit.legacyUserProfileCustomizations.stylesheets Double-click on the preference, to set its value to true

And restart Firefox

If you change userChrome.css, restart Firefox

Below, the result of the test

That seems the solution, disable (false) the browser.nova.enabled via about:config

Indeed related to the new version ....

Take a look at this discussion thread https://support.mozilla.org/en-US/questions/1608575#answer-1855453

About, browser.nova.enabled According to https://connect.mozilla.org/t5/discussions/nova-ui-config/m-p/140919/highlight/true#M57439 - https://bugzilla.mozilla.org/show_bug.cgi?id=2071454

A space for users to give product feedback https://support.mozilla.org/en-US/kb/what-mozilla-connect