We're calling on all EU-based Mozillians with iOS or iPadOS devices to help us monitor Apple’s new browser choice screens. Join the effort to hold Big Tech to account!

Avatar for Username

Search Support

Avoid support scams. We will never ask you to call or text a phone number or share personal information. Please report suspicious activity using the “Report Abuse” option.

Learn More

Natao arisiva ity resaka mitohy ity. Mametraha fanontaniana azafady raha mila fanampiana.

How to edit system theme?

  • 1 valiny
  • 1 manana an'ity olana ity
  • 1 view
  • Valiny farany nomen'i TyDraniu

invctbehipwmohlyjq
invctbehipwmohlyjq
more options

Hi!

I want to edit system theme for firefox. Where exactly is it stored on the disk?

Previously it is asked here: https://support.mozilla.org/en-US/questions/940165

But that answer does not reveal the exact file location.

For example if I want to tweak font used on browser tab or shadow color around browser tab what exactly do I have to edit?

PS I dont want simply to customize colors like themes you can find on the internet do. I want to customize entire html/css that is used in FF UI.

Hi! I want to edit system theme for firefox. Where exactly is it stored on the disk? Previously it is asked here: https://support.mozilla.org/en-US/questions/940165 But that answer does not reveal the exact file location. For example if I want to tweak font used on browser tab or shadow color around browser tab what exactly do I have to edit? PS I dont want simply to customize colors like themes you can find on the internet do. I want to customize entire html/css that is used in FF UI.

All Replies (1)

TyDraniu
TyDraniu
  • Top 10 Contributor
more options

Everything is explained here: https://www.reddit.com/r/FirefoxCSS/comments/73dvty/tutorial_how_to_create_and_livedebug_userchromecss/