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.

Fontsize problem using KDE Plasma 5.27

  • 2 replies
  • 0 have this problem
  • 9 views
  • Last reply by userid0x0

userid0x0
userid0x0
more options

Hi, I noticed the fontsize of the `mainline` Thunderbird 102.12.0 is quite different (very much too small) on KDE Plasma 5.27.5 since my upgrade to Debian Bookworm. Basically the machine is a default Debian Bookworm installation. Changing the `layout.css.devPixelsPerPx` value didn't result in the expected behavior. Interestingly `mainline` Firefox / GTK based / Qt based applications are not affected and the problem (too small fontsize) is only there for Thunderbird.

I managed to find a workaround setting ``` GDK_DPI_SCALE=1.2 GDK_SCALE=1 ``` only for thunderbird e.g. by invoking it via ``` GDK_DPI_SCALE=1.2 GDK_SCALE=1 thunderbird ``` in the `.desktop` file.

Hi, I noticed the fontsize of the `mainline` Thunderbird 102.12.0 is quite different (very much too small) on KDE Plasma 5.27.5 since my upgrade to Debian Bookworm. Basically the machine is a default Debian Bookworm installation. Changing the `layout.css.devPixelsPerPx` value didn't result in the expected behavior. Interestingly `mainline` Firefox / GTK based / Qt based applications are not affected and the problem (too small fontsize) is only there for Thunderbird. I managed to find a workaround setting ``` GDK_DPI_SCALE=1.2 GDK_SCALE=1 ``` only for thunderbird e.g. by invoking it via ``` GDK_DPI_SCALE=1.2 GDK_SCALE=1 thunderbird ``` in the `.desktop` file.

All Replies (2)

Matt
Matt
  • Moderator
  • Top 10 Contributor
more options

Did you try using the user interface font setting in the view menu before trying to hack setting in the user preferences file. Using the user interface is more likely to give you a lasting or workable result than hacking, although Linux can need more hacking that other operating systems because nothing is "standard" even between distributions.

userid0x0
userid0x0 Question owner
more options

Matt, thank you so much. You don't want to know how long I browsed through the `Settings` menu for that feature. That hint helped.