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

Natao arisiva ity resaka mitohy ity. Mametraha fanontaniana azafady raha mila fanampiana.

How to use custom system fonts on Firefox Developer?

  • 4 valiny
  • 1 manana an'ity olana ity
  • 3 views
  • Valiny farany nomen'i cor-el

more options

Hello there,

I've recently switched from Firefox to Firefox Developer. I've noticed that while in FF, I am able to change the default fonts (such as San-Serif font to Inter, and Monospace font to Monaco), but in FF Developer, I am unable to change the fonts to anything but the defaults. Can someone help me fix this issue, or is this issue a feature of FF Developer edition?

Thanks a lot, dodeca12

Hello there, I've recently switched from Firefox to Firefox Developer. I've noticed that while in FF, I am able to change the default fonts (such as San-Serif font to Inter, and Monospace font to Monaco), but in FF Developer, I am unable to change the fonts to anything but the defaults. Can someone help me fix this issue, or is this issue a feature of FF Developer edition? Thanks a lot, dodeca12
Sarin'efijery napaingotra

Novain'i dodeca12 t@

All Replies (4)

more options

Gahh I messed up typing this, please disregard.

Novain'i dodeca12 t@

more options

Do you at least see the fonts list when you click the down arrow ?


Start Firefox in Safe Mode to check if one of the extensions ("3-bar" menu button or Tools -> Add-ons -> Extensions) or if hardware acceleration is causing the problem.

  • switch to the DEFAULT theme: "3-bar" menu button or Tools -> Add-ons -> Themes
  • do NOT click the "Refresh Firefox" button on the Safe Mode start window

See also:

more options

Hello there,

Firstly thanks a lot for your reply. After following your instructions, I still am not able to choose my preferred fonts :( I am unable to even see the installed system fonts on Firefox Developer.

more options

You can create a new profile as a quick test to see if your current profile is causing the problem.

See "Creating a profile":

If the new profile works then you can transfer files from a previously used profile to the new profile, but be cautious not to copy corrupted files to avoid carrying over problems.