Windows 10 reached EOS (end of support) on October 14, 2025. If you are on Windows 10, see this article.

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
Èròjà atẹ̀lélànà yii ni a ti fi pamọ́ fọ́jọ́ pípẹ́. Jọ̀wọ́ béèrè ìbéèrè titun bí o bá nílò ìrànwọ́.
A ti fi pamọ́ fọ́jọ́ pípẹ́

How to disable HiDPI support

Firefox Òmíìràn
cor-el replied
dergrunepunkt
dergrunepunkt

Firefox seems to detect that I'm using a HiDPI display and scales automatically, I really want to disable this so GNOME can handle the window scaling. I can't find the way. BTW changing the "layout.css.dpi" about:config makes no difference.

I'm using:

  • FF Quantum
  • GNOME 3.26.2
  • Ubuntu 17.10

Cheers

Firefox seems to detect that I'm using a HiDPI display and scales automatically, I really want to disable this so GNOME can handle the window scaling. I can't find the way. BTW changing the "layout.css.dpi" about:config makes no difference. I'm using: * FF Quantum * GNOME 3.26.2 * Ubuntu 17.10 Cheers

All Replies (4)

user1929
user1929

Does it work if you set layout.css.devPixelsPerPx in about:config to 1.0?

dergrunepunkt
dergrunepunkt Ìbéèrè olóhun

Like I mention in my original posting that makes no difference.

user1929
user1929

Just to be clear, you've tried both "layout.css.dpi" (which is what you mentioned in your original post) and "layout.css.devPixelsPerPx", and neither one worked? Because they're different settings.

cor-el
cor-el
  • Olúdásí mẹ́wà Òkè
  • Níwọ̀ntúwọ̀nsì

See also:

  • bug 1081142 - [HiDPI] select an appropriate scale factor on Linux

(please do not comment in bug reports
https://bugzilla.mozilla.org/page.cgi?id=etiquette.html)