There is a bunch of browsers out there and one would think the differences in behavior are nearly zero. Unfortunately, that's not quite true.
In CentralStationCRM we use the latest techniques and require a lot from the browser. To use the full comfort, we recommend the use of a modern browser based on the Webkit Technology. These currently include the browsers from Apple (Safari) and Google (Chrome). But even with the latest version of Mozilla Firefox, the use of CentralStationCRM should be unrestricted.
Only the use of an older Microsoft Internet Explorer we do not recommend. In particular, the versions prior to version 10 often do not behave according to current web standards.