I got an overview of values for the variables config_device_type and config_browser_name of the piwik_log_visit table.
Now I can’t assign the values to real device types and browser names. I have no access to the Matomo-/Piwik-Database, just these values.
The config_device_type values are 0, 1 and 2 and I guess this means mobile etc.
The config_browser_name values are CH (Chrome ?), CI, FF (Firefox ?), IE (Internet Explorer ?), MF, PS and SF (Safari ?).