Hello,

Firefox on Windows is now following display scaling options which may render text larger on high resolution displays. You can adjust your screen resolution. To modify it do the following:

• Type about:config into the Firefox address bar and tap on the Enter key.
• If the warning This might void your warranty appears, click I'll be careful, I promise.
• Search for layout.css.devPixelsPerPx

• Double-click on layout.css.devPixelsPerPx to modify its value. The default is -1.0 in Firefox 22 and above. Change it to 1.0 to make it work like in previous Firefox versions.

If necessary, further adjust the value in 0.1 or 0.05 steps. Use values between 1.0 and about 0.5 to reduce elements in size. Use values greater than 1.0 to increase size. For example, a value of 1.25 will increase font size to 125% to accommodate the default DPI setting in Windows 8. Double check the value that you enter. Setting a too small value will make everything disappear and a too large value will blow things up.

If web pages still need to be adjusted then you can look at the Default FullZoom Level or NoSquint extension.

To adjust the font size for the user interface, you can use the Theme Font & Size Changer extension.

Did this fix your problems? Please report back to us!

Thank you.

This does not work. I have tried everything, and each time I close and reopen Firefox, my screen is back to the swollen version. I don't want to have to change the size of every website I open. Please tell me how to make the screen the same size it was before this "update" occurred. (I will never understand why so-called updates are made without a way for people to keep the settings they like!)

My problems are the same a Artilyn's. In trying to fix something Firefox has broken things for me. You say we should update to ver 22.0, but, it does not work as good as the previous versions. This is step backwards, not forward.

layout.css.devPixelsPerPx helps some, but my homepage and webmail pages are still too large for comfort. When I make them smaller then the bookmarks list, the top of the page, etc get too small. Cannot get a happy medium!!!

You will have a happy medium after reading this.

• Webpages are large and blurry after updating Firefox - how to fix