Stop Firefox DPI Scaling (when Windows setting is at 125%)

Question

I\'m currently making a webpage and testing it in chrome works fine, but in Firefox - it is zoomed in.

This is because my DPI in Windows is set to 125%, and Firefox

Answer 1

This frustrated me too, but luckily there is a solution.

Navigate to about:config. (Click accept on any warnings telling you to be careful with advanced features)

Search for layout.css.devPixelsPerPx and change its value to 1.0 and your issue should be fixed.

It was something implemented in Firefox 22.