I see that the "screen resolution" is smaller than the "browser size" in MANY cases. How is that possible?
Some of these entries look a bit fishy. Any ideas what's going on? Is there a bug in Google Analytics?
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I've tried for the last couple of days to unveil the mystery around how the Browser Size dimension in Google Analytics is computed, and couldn't find an authoritative source yet.
In my own observations of GA data, across different GA accounts, targeting wildly different websites, Browser Size is capped at 2610x1610 top. And I don't know why. Of course that is so wrong that makes me wonder what Browser Size represents, actually.
Anyway, back to the question
How can Screen Resolution be smaller than Browser Size in Google Analytics?
The viewport width is directly
innerWidth, which can be increased or decreased by zooming out or in, respectively.
For example, lest's start from a browser window which is 1000px wide at 100% zoom.
innerWidthbecomes 2000px wide
innerWidthbecomes 500px wide
In Google Chrome, a maximised browser window spans all the available screen width, thus (at 100% zoom and with a
devicePixelRatio of 1)
innerWidth happens to be equal to the screen width. At other zoom levels,
innerWidth can be bigger or smaller, depending on the zoom level.
It would have been great if Browser Size had been