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I have a completely fresh installation of Firefox 22.0 on Windows 7 and I just opened a website.

The website appeared to be zoomed (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 zoomed.

Compared with Chrome where everything is looking fine, in Firefox images and fonts are magnified!

Any pointers on what is going on here? How can I switch this off?

enter image description here

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What is Strg+0? –  Alvin Wong Jul 4 '13 at 9:45
A keyboard-shortcut to set the zoom to 0 which means "no zoom" –  nerdess Jul 4 '13 at 9:49
its CTRL+0 in english –  DanFromGermany Jul 4 '13 at 10:09
could it be, that the zoom in firefox is 100%, but the zooom in chrome is at 85% ? did you hit strg/ctrl+0 in chrome too ? –  DanFromGermany Jul 4 '13 at 10:09
the zoom in chrome is 100% and how it's supposed to be. e.g. when i take a screenshot of a website i built in chrome and compare it with the corresponding photoshop file the pixels align perfectly. –  nerdess Jul 4 '13 at 10:15

2 Answers 2

up vote 4 down vote accepted

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 (e.g. "125%" corresponding to 120dpi). There is some info on Mozilla support forums:



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1) Type "about:config: in address bar
2) search for "layout.css.devPixelsPerPx"
3) change value of "layout.css.devPixelsPerPx" from -1.0 to 1.0

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