Suramya's Blog : Welcome to my crazy life…

October 21, 2022

Disable Dark Theme in the Private Browsing mode in Firefox 106

Filed under: Computer Software,Computer Tips,Knowledgebase,Tech Related — Suramya @ 10:09 AM

A lot of people like Dark themes for their apps but I am not one of them. For me the Dark mode strains my eyes more so I usually disable it as soon as possible. In the latest Firefox update (v106), Firefox changed a bunch of defaults and one of the changes is that when you open a window in incognito mode it uses the Dark theme by default. As per the release notes this is a conscious decision:

We also added a modern look and feel with a new logo and updated it so Private Browsing mode now defaults to dark theme, making it easier to know when you are in Private Browsing mode.

The dark theme really annoys me so I started looking for ways to disable it. Unfortunately, it can’t be disabled without having to change my default Theme (which is to use the System Defaults) which I didn’t want to do and a quick internet search didn’t return any useful results. So I decided to check out the about:config section to see if there is a hidden setting and lo-behold it was there. A quick change disabled the theme for the Private browsing mode and things were back to normal.

The steps to disable the dark theme in incognito mode are as follows:

  • Type about:config in the address bar and press Enter.
  • A warning page may appear. Click Accept the Risk and Continue to go to the about:config page.
  • Search for “theme” in the Search preference name box at the top of the page and you will see an entry for “browser.theme.dark-private-windows”
  • Double click on “True” for the entry to change the value to false.
  • The entry should look like the following. Then you can close the tab and you are done.


To revert the change, just repeat the steps and set the value back to True.

– Suramya

2 Comments »

  1. Thanks, I will give this a try.
    Decided to look today if there was a resolve.
    I too hate what was done in version 106.
    I immediately reverted back to older 105.0.3

    Comment by Mary — October 30, 2022 @ 7:06 AM

  2. I hope the steps worked for you.
    I dislike downgrading so avoid it whenever possible, hence the search for a rollback setting (Mozilla is usually quite good at giving customization options)

    – Suramya

    Comment by Suramya — November 9, 2022 @ 12:09 AM

RSS feed for comments on this post. TrackBack URL

Leave a comment

Powered by WordPress