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FF interface font size

  • 4
  • 1 nwere nsogbu anwere nsogbu a
  • 567 views
  • Nzaghachi ikpeazụ nke AnaRonRanch

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For the recent past, the font size on FF tabs, url, bookmark bar, tabs and anything else to do with the actual FF program has a font so small that it is unreadable unless I use the W10 magnifier. I have spent hours, days and weeks trying everything I can find to increase the font size and nothing has worked. I am vision impaired and understand that everything cannot be adjusted to my needs BUT there are hundreds of postings on line by people with good vision complaining about the non adjustable font sizes. Does FF have any intentions on finding a fix for this? I am an avid user of FF but am at a point with my vision to where it is too problematic for me to continue using. If you cannot fix this issue then I must find a program that does not have this problem. It may very well be a conflict between FF and W10 but even that were the case, there are supposed to be a lot of intellingent individuals that should be able to remedy this situation. Please advise of your intentions as soon as possible in order that I may proceed with my plans. Sincerely, Ron Burnes

For the recent past, the font size on FF tabs, url, bookmark bar, tabs and anything else to do with the actual FF program has a font so small that it is unreadable unless I use the W10 magnifier. I have spent hours, days and weeks trying everything I can find to increase the font size and nothing has worked. I am vision impaired and understand that everything cannot be adjusted to my needs BUT there are hundreds of postings on line by people with good vision complaining about the non adjustable font sizes. Does FF have any intentions on finding a fix for this? I am an avid user of FF but am at a point with my vision to where it is too problematic for me to continue using. If you cannot fix this issue then I must find a program that does not have this problem. It may very well be a conflict between FF and W10 but even that were the case, there are supposed to be a lot of intellingent individuals that should be able to remedy this situation. Please advise of your intentions as soon as possible in order that I may proceed with my plans. Sincerely, Ron Burnes

Asịsa ahọpụtara

Appreciate the response. layout.css.devPixelsPerPx does absolutely nothing regardless of the number set. The zoom for webpages works great as does all the other settings. Nothing in about:config has any effect on the issue.

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You can set layout.css.devPixelsPerPx to 1.0 or 1.5 (default is -1) on the about:config page. Adjust its value in 0.1 or 0.05 steps like 1.1 to enlarge or 0.9 to reduce until icons/text looks right. You may need values above 2.0 if you have a high resolution display but 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. On the warning page, you can click "Accept the Risk and Continue"to open about:config.

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Asịsa Ahọpụtara

Appreciate the response. layout.css.devPixelsPerPx does absolutely nothing regardless of the number set. The zoom for webpages works great as does all the other settings. Nothing in about:config has any effect on the issue.

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Try this solution:


You can create a new Number pref on the about:config pagee and set its value to 100.

  • about:config => ui.textScaleFactor = 100
  • /questions/1384204 SINCE THE LAST UPDATE, THE FIREFOX SCREEN DOES NOT FIT MY SYSTEM SETTING(125%)

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

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Every site and everyone keeps saying layout.css.devPixelsPerPx works so I went back thru 7 different Firefox profiles and could not get any of them to allow me to make the changes. This led me back to my thought that it might be W10. Decide that I would go thru my 9 W10 user profiles and found 1 dated 10/15/22 that allowed layout.css.devPixelsPerPx to use 2.0 to get what I needed. Don't know what caused the issue but thank you for making me take a different look at what I had done numerous times that did not work.

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