435275 - window.outerWidth/Height not reporting actual accurate values when page is Zoomed. No way to track user stats as to actual size of window.

Status: RESOLVED INCOMPLETE

(Core :: Layout, defect)

Description

[Richard Fink]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9) Gecko/2008051206 Firefox/3.0
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9) Gecko/2008051206 Firefox/3.0

In tracking user stats, for Moz/FireFox we have always used window.outerWidth and window.outerHeight to track window sizes.
However, with the new Zoom feature, FF is reporting those values at a "Zoomed" size - not the actual pixel screen size of the window. (screenY, screenX, and window.screen.width/height still report the actual pixel screen pixels. Why not outerWidth/Height?) 
Unless this is fixed, there is no way to distinguish between a window that is sized to, say, 80% of the screen height or width versus a window that's content is being Zoomed to 125% !!!
Seems like a needless "breaking" of an old and reliable pair of properties.
Please, please, please, rectify this.

Reproducible: Always

Steps to Reproduce:
1.Open the browser window to full screen width and height
2.Zoom the page to 120% (Ctrl+1, twice)
3. Take measurements using script properties usually used to measure window size, like: window.innerWidth, document.documentElement.offsetWidth, etc...
4. Reset the window to no Zoom (Ctrl+0, once)
5. Size the window to appr 83% of the screen width
6. Compare the values of window.innerWidth, document.documentElement.offsetWidth, etc to the values recorded earlier
Actual Results:  
The size measurements taken of the document's contents at a window size of appr 85% of the width or height of the screen match the size measurements taken of the document's contents at a Zoomed level of 120%.
How can you distinguish between a window sized smaller than the full width of the screen as opposed to a window that has been zoomed?


Expected Results:  
Was expecting the window.outerWidth/Height properties to return the actual outerWidth/Height of the window as does the window.screenY/screenX, and window.screen.width/height do, regardless of whether the inner contents of the window have been Zoomed.

The software should return the actual values based on screen resolution for window.outerWidth/Height, instead of "Zoomed", skewed values. Just as the window.screenX/Y and window.screen.width/height, do.
This seems like needless, "breaking" of the window.outerWidth/Height properties.

Comment 1

[Gunther]

Additionally this leads to a misinterpretation of media queries which contain (min, max) width or height values.

Opera 10 beta2 Win shows the same misbehaviour contrary to Safari 4.0.2 Win!

Comment 2

[Phoenix]

Is this problem still actual? Can you provide testcase?

Comment 3

[u279076]

Please reopen this bug if it's reproducible in the latest Nightly.

Comment 4

[Daniel]

Update: This bug is still currently active in Firefox version 61.0.1 (64-bit).

Testcase:
https://jsfiddle.net/bgmzr0ys/12/
Follow the original steps to produce.