Join the AMA (Ask Me Anything) with the Firefox leadership team to celebrate Firefox 20th anniversary and discuss Firefox’s future on Mozilla Connect. Mark your calendar on Thursday, November 14, 18:00 - 20:00 UTC!

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

Cuireadh an snáithe seo sa chartlann. Cuir ceist nua má tá cabhair uait.

How do I increase the font size of the header?

  • 4 fhreagra
  • 1 leis an bhfadhb seo
  • 1 view
  • Freagra is déanaí ó cor-el

more options

How do I increase the font size of the header? It doesn't change when I increase the size of the page display. All I can find on here is archived information that doesn't help with the problem.

How do I increase the font size of the header? It doesn't change when I increase the size of the page display. All I can find on here is archived information that doesn't help with the problem.

All Replies (4)

more options

What do you mean by "the header"? Are you referring to something on a website or part of the browser?

more options

Hi there, I was in the firefox web browser section looking for answers about how to increase the font size of the bookmarks bar. I have already increased the font size of the webpages but the bookmarks are tiny. Is there a way to make them larger? Cheers

more options

You have to create a file called userChrome.css. This code may do what you want: https://support.mozilla.org/en-US/questions/1348994

more options

You can set layout.css.devPixelsPerPx to 1.0 (default is -1) on the about:config page. Adjust its value in 0.1 or 0.05 steps (1.1 to enlarge or 0.9 to reduce) until icons or text looks right. Make sure not to use values too large or too small.

  • modifying layout.css.devPixelsPerPx affects user interface and webpages (global zoom)

Firefox has a Zoom section in Settings to set the default zoom level for webpages.

  • Settings -> General -> Language and Appearance -> Zoom

You can open the about:config page via the location/address bar. You can click the button to "Accept the Risk and Continue".