Avatar for Username

Mozilla サポートの検索

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.

詳しく学ぶ

このスレッドはアーカイブに保管されました。 必要であれば新たに質問してください。

What FF setting triggers dark mode on websites?

  • 1 件の返信
  • 1 人がこの問題に困っています
  • 1 回表示
  • 最後の返信者: BWPanda

BWPanda
BWPanda
more options

I have two FF profiles. When I open a private window in each profile and go to YouTube, one displays YT in light mode, while the other displays it in dark mode. In both windows, YT is set to ‘Appearance: Device theme’. Both profiles use FF’s ‘Dark’ theme. The same happens when I go to other websites that utilise ’ prefers-color-scheme’ (e.g. https://dashboard.tugboat.qa).

Since these two profiles display websites in different colour schemes on the same computer, it’s clearly not an OS setting. It therefore must be a setting in FF - one that’s enabled in one profile but disabled in the other. I’d like to know what it is.

I’ve tried comparing about:config in both profiles, searching for things like ‘dark’, ‘theme’, ‘color’, etc. But I can find no differences. Can anyone shed some light (pun intended) on this for me?

I have two FF profiles. When I open a private window in each profile and go to YouTube, one displays YT in light mode, while the other displays it in dark mode. In both windows, YT is set to ‘Appearance: Device theme’. Both profiles use FF’s ‘Dark’ theme. The same happens when I go to other websites that utilise ’ prefers-color-scheme’ (e.g. https://dashboard.tugboat.qa). Since these two profiles display websites in different colour schemes on the same computer, it’s clearly not an OS setting. It therefore must be a setting in FF - one that’s enabled in one profile but disabled in the other. I’d like to know what it is. I’ve tried comparing about:config in both profiles, searching for things like ‘dark’, ‘theme’, ‘color’, etc. But I can find no differences. Can anyone shed some light (pun intended) on this for me?
添付されたスクリーンショット

選ばれた解決策

I finally worked this out. It's the result of setting 'privacy.resistFingerprinting' to TRUE on the profile that was showing in light mode. With this set back to the default setting of FALSE, websites now show in dark mode.

この回答をすべて読む 👍 0

すべての返信 (1)

BWPanda
BWPanda 質問者
more options

選ばれた解決策

I finally worked this out. It's the result of setting 'privacy.resistFingerprinting' to TRUE on the profile that was showing in light mode. With this set back to the default setting of FALSE, websites now show in dark mode.