Why the items displayed as specified?

I am developing a website (my first) and I wish that it displays the same in the major browsers. With Firefox, things are 25% larger that I specify. I did a simple test with a div element: < body > < div style = "background-color: red;" Width: 300px; "> it's 300px div < div > < /body >. (Spaces added to this issue other than the tags are not displayed). The size of the div on my screen is 375px (as determined by pasting a picture of the screen in Paint).

My Firefox setting is 100%. I have a screen 1680 x 1050 and I was wondering if Firefox was an adjustment in accordance with the resolution of my screen. I changed the resolution of 1360 x 768, 1280 x 1024, 1280 x 800, 1440 x 900 and even 800 x 600 and got the same result.

I could set the zoom setting to compensate on my screen, but it is not a solution because I can not clearly do visitors to my site.

What is the origin of Firefox to display more to expect and how to compensate?

PS. When the browser window is maximized and the screen resolution is 1680 X 1050, document.body.clientWidth and document.body.offsetWidth are two 1311 - which gives a ratio of about 1.25. Why prices clientWidth, offsetWidth not roughly equal to the width of the screen.

You can set the pref layout.css.devPixelsPerPx 1.0 to disable the 1.25 increase caused by the PPP of Windows (default is - 1) setting.

Otherwise you must set the PPP of Windows setting to 96...

Tags: Firefox

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