Strange default increase in Firefox 22.0

Question

I have a brand new installation of Firefox 22.0 on Windows 7, and I just opened a website.

The site seems to have been enlarged (fonts as well as images), so I hit Strg + 0 with no effect. I tried other websites and it was the same - they were all enlarged.

Compared to Chrome, where everything looks good, images and fonts are larger in Firefox!

Any pointers to what's going on here? How to disable this?

Answer 1

It seems that this behavior is caused by the fact that from version 22 Firefox takes into account the font size set in the OS (for example, "125%", corresponding to 120dpi). The Mozilla Support Forums have information:

http://support.mozilla.org/en-US/questions/962945

http://support.mozilla.org/en-US/questions/963211

Answer 2

1) Enter "about: config: in the address bar
2) find "layout.css.devPixelsPerPx"
3) change the value of "layout.css.devPixelsPerPx" from -1.0 to 1.0