Theme Font & Size Changer


Modify the aspect of Firefox with Theme Font & Size Changer. Customise the style of the Mozilla browser by downloading Theme Font & Size Changer right now

7/10 (25 Votes)

Fed up of the same Firefox aspect? Download the Theme Font & Size Changer add-on and change the fonts, size and colours of the browser's interface.

Adapt the aspect of Firefox to your own liking

If you're bored of Firefox always having the same aspect, with Theme Font & Size Changer you can provide it with a much more attractive appearance. With this add-on you can modify the size and type of fonts, the style or the color of the interface. You only have to go to the section of add-ons of the browser's main menu to open the pop-up window from which, thanks to a simple interface, you can modify these aspects to your own liking.


  • Choose between dozens of fonts and modify their size.
  • Select character thicknesses and styles.
  • Choose an appropriate color both for the characters as well as the background from a wide color palette.

Download Theme Font & Size Changer for Firefox and customize the Mozilla browser to your own liking.

Antony Peel
Antony Peel
Baris Derin
Over a year ago
More than a year ago
230 KB

We'd love to hear from you. Do you want to give us your opinion?

Logged off

Logged off