I have Windows 7 Home Premium. Set to 125% in the Display control panel. I have a 17 inch CRT monitor. Screen resolution is 1152 x 864.

Since Firefox version 22 600-pixel-wide images on the web have now greatly enlarged. To 8+ inches wide on the monitor.

In Chrome and Internet Explorer the same images on the same web page are 6.5 inches wide.

600-pixel-wide images on my PC viewed with IrfanView are 6.5 inches wide.

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.

Yes, this fixed the problem. Thank you, Waka_Flocka_Flame. 600-pixel-wide images are now the same width on my monitor in Firefox, Internet Explorer, Chrome, and IrfanView.

But none of those other programs required me to change anything.

This change in Firefox version 22 is a really bad idea. Many people will not tolerate going to about:config to fix this. And they shouldn't have to.

Firefox should follow the herd in this case and go back to what they were doing in the past.

Otherwise, Firefox will follow the path of Opera and its nonsensical purist web-standard policy, and become used by fewer and fewer people. Until Firefox becomes as irrelevant as Opera.

This change in Firefox version 22 is a really bad idea. Many people will not tolerate going to about:config to fix this. And they shouldn't have to.

Agreed, put feedback at input.mozilla.org/feedback