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.

Where can I go to adjust the font size of the headers, tabs, tool bars? Messages, pages, on screen appears normal and can be adjusted using ctrl +-.

  • 2 replies
  • 1 has this problem
  • 114 views
  • Last reply by David

David
David
more options

Running Firefox 28.0. Just updated, that did not help. The font size on Firefox and Thunderbird increased for the headers, tabs, toolbars, drop down menus, etc. What is in the display appears normal and can be adjusted using the ctrl +- keys. That has no effect on the toolbars, headers, etc. My resolution is at max, icons small, text size at 100%.

Running Firefox 28.0. Just updated, that did not help. The font size on Firefox and Thunderbird increased for the headers, tabs, toolbars, drop down menus, etc. What is in the display appears normal and can be adjusted using the ctrl +- keys. That has no effect on the toolbars, headers, etc. My resolution is at max, icons small, text size at 100%.

Chosen solution

You can set the layout.css.devPixelsPerPx pref on the about:config page to 1.0 or on Windows 8 to 1.25 and if necessary adjust layout.css.devPixelsPerPx starting from 1.0 in 0.1 or 0.05 steps (1.1 or 0.9) to make icons show correctly.

See also:

Use an extension to adjust the text size in the user interface and the page zoom in the browser window.

You can look at this extension to adjust the font size for the user interface.

You can look at the Default FullZoom Level or NoScript extension if web pages need to be adjusted after changing layout.css.devPixelsPerPx.

Read this answer in context 👍 0

All Replies (2)

cor-el
cor-el
  • Moderator
  • Top 10 Contributor
more options

Chosen Solution

You can set the layout.css.devPixelsPerPx pref on the about:config page to 1.0 or on Windows 8 to 1.25 and if necessary adjust layout.css.devPixelsPerPx starting from 1.0 in 0.1 or 0.05 steps (1.1 or 0.9) to make icons show correctly.

See also:

Use an extension to adjust the text size in the user interface and the page zoom in the browser window.

You can look at this extension to adjust the font size for the user interface.

You can look at the Default FullZoom Level or NoScript extension if web pages need to be adjusted after changing layout.css.devPixelsPerPx.

David
David Question owner
more options

I managed to make it better, but it only changed Firefox not Thunderbird. Things are still screwy, but better.