This site will have limited functionality while we undergo maintenance to improve your experience. If an article doesn't solve your issue and you want to ask a question, we have our support community waiting to help you at @FirefoxSupport on Twitter and/r/firefox on Reddit.

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.

Regardless of the chosen theme Firefox, Windows 10 changes it to its own. How to fix it?

  • 4 replies
  • 1 has this problem
  • 1 view
  • Last reply by McCoy

Seregka
Seregka
more options

Install Firefox 63 on new windows 10. Choose dark theme in options. it is set, but then almost immediately changes to the system color.

Install Firefox 63 on new windows 10. Choose dark theme in options. it is set, but then almost immediately changes to the system color.

All Replies (4)

McCoy
McCoy
more options

Hello Seregka,

Would you please look at what is new in the current Firefox version :

https://www.mozilla.org/en-US/firefox/63.0/releasenotes/?utm_source=firefox-browser&utm_medium=firefox-browser&utm_campaign=whatsnew

It says : Firefox theme now matches the Windows 10 OS Dark and Light modes

That means that you'd have to change that setting in Windows ....

jscher2000 - Support Volunteer
jscher2000 - Support Volunteer
  • Top 25 Contributor
more options

Hi Seregka, the Default theme should follow your Windows theme if you're on Windows 10, but the Dark theme should use colors set by Mozilla for all versions of Windows. Do both of them look bad on your system?

Seregka
Seregka Question owner
more options

Install an update 63.0.1. Choose the dark mode in win10 and in Firefox (or any other theme). Getting the same...

McCoy
McCoy
more options

In case you're interested (maybe for future reference) :

If in Windows 10 you use a custom theme, Firefox will ignore it.

If in Windows 10 you use a dark theme and want the theme in Firefox to be light :

You can create a new integer preference named :

ui.systemUsesDarkTheme on the about:config page and set its
value to 0 ('zero') - then close and restart Firefox.