The 'Browser' dimension reports the name and version of the browser sending the hit. This dimension is useful to understand what the most common browsers that visitors use. When testing new versions of your site, you can run those tests on the top browsers in this dimension to maximize quality control efforts.
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This dimension references a lookup table internal to Adobe. The lookup value is based on the User-Agent HTTP header in image requests. If you use an AppMeasurement library (such as through Adobe Experience Platform Launch), this dimension works out of the box.
Dimension values include the browser names and versions used. Different versions of the same browser are separate dimension values.
Some dimension values contain "(unknown version)" instead of their version number. This dimension value references a recent browser release that Adobe has not added to their lookup tables. Since browsers frequently update, the "(unknown version)" for a given browser is common and temporary. Adobe typically updates lookup tables during monthly maintenance releases.