Mozilla VPN is currently experiencing an outage. Our team is actively working to resolve the issue. Please check the status page for real-time updates. Thank you for your patience.

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.

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

Changing font for subject line window and left bar, TB 115

  • 1 reply
  • 1 has this problem
  • 6 views
  • Last reply by sfhowes

more options

Just upgraded to TB 115 on Mac. I've always thought that the default font for the TB system, used in the subject lime window and left bar (as opposed to the font for composing messages) was too small, and there never seemed to be a way of making it larger. With the upgrade to 115, it got even smaller!

The knowledge base suggested to use the Config Editor to modify the variable layout.css.devPixelsPerPx (normally set to -1) to 1.4. This resulted it a nice display on my big monitor, but dragging the window to my laptop screen resulted in an extremely tiny font!

I need a reliable way to do this. Otherwise, I'll have to revert versions, or at worst, give up on T'bird, which I don't want to do.

Just upgraded to TB 115 on Mac. I've always thought that the default font for the TB system, used in the subject lime window and left bar (as opposed to the font for composing messages) was too small, and there never seemed to be a way of making it larger. With the upgrade to 115, it got even smaller! The knowledge base suggested to use the Config Editor to modify the variable layout.css.devPixelsPerPx (normally set to -1) to 1.4. This resulted it a nice display on my big monitor, but dragging the window to my laptop screen resulted in an extremely tiny font! I need a reliable way to do this. Otherwise, I'll have to revert versions, or at worst, give up on T'bird, which I don't want to do.

All Replies (1)

more options

Try making changes with the View/Density and View/Font Size menus.