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

This thread was archived. Please ask a new question if you need help.

How to edit system theme?

  • 1 reply
  • 1 has this problem
  • 1 view
  • Last reply by 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 25 Contributor
more options

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