Windows 10 will reach EOS (end of support) on October 14, 2025. For more information, see this article.

Avatar for Username

Kërkoni te Asistenca

Shmangni karremëzime gjoja asistence. S’do t’ju kërkojmë kurrë të bëni një thirrje apo të dërgoni tekst te një numër telefoni, apo të na jepni të dhëna personale. Ju lutemi, raportoni veprimtari të dyshimtë duke përdorur mundësinë “Raportoni Abuzim”.

Mësoni Më Tepër

Firefox built-in PDF viewer stuck in light mode when privacy.resistFingerprinting is enabled

  • 1 përgjigje
  • 0 e kanë hasur këtë problem
  • 11 parje
  • Përgjigjja më e re nga Paul

Xinyue Wang
Xinyue Wang
more options

Hi everyone,

After enabling `privacy.resistFingerprinting = true` in `about:config`, I noticed that Firefox’s built-in PDF viewer (`pdf.js`) is always displayed in **light mode**, even though my system and browser themes are both dark.

I understand that RFP forces `prefers-color-scheme: light` to prevent fingerprinting, but this also affects internal components like the PDF reader. Unfortunately, the PDF viewer doesn’t provide a manual dark mode toggle.

Is there any **official or safe workaround** that allows keeping RFP enabled while still having the PDF viewer use dark colors?

Thanks!

Hi everyone, After enabling `privacy.resistFingerprinting = true` in `about:config`, I noticed that Firefox’s built-in PDF viewer (`pdf.js`) is always displayed in **light mode**, even though my system and browser themes are both dark. I understand that RFP forces `prefers-color-scheme: light` to prevent fingerprinting, but this also affects internal components like the PDF reader. Unfortunately, the PDF viewer doesn’t provide a manual dark mode toggle. Is there any **official or safe workaround** that allows keeping RFP enabled while still having the PDF viewer use dark colors? Thanks!

Krejt Përgjigjet (1)

Paul
Paul
  • Top 10 Contributor
  • Moderator
more options

Hi

The fingerprinting resistance is based on presets to try to achieve that aim and may not always lead to a configuration you would prefer for browsing.

An overview of a number of the settings are at https://support.mozilla.org/en-US/kb/resist-fingerprinting and I would avoid about:config if possible.

E dobishme?

Bëni një pyetje

Duhet të bëni hyrjen te llogaria juaj që t’i përgjigjeni postimeve. Ju lutemi, filloni me një pyetje të re, nëse nuk keni ende një llogari.