As part of our planned server upgrades, we are updating the list of supported devices/browsers to be in line with modern design and security requirements. The oldest compatible clients will be: Firefox 27+ [released 2014], Chrome 30+ [2013], any MS Edge [2015], Opera 17+ [2013], Safari 9+ [desktop, 2015], iOS 7+ [mobile, 2013], Android 4.4.2 [mobile, 2013], IE 11+ on Windows 7 or higher [2013]. The limits on this compatibility list are determined by either the software design or the server systems (such as the SSL connection security requirements). Based on our usage analytics from last 6 months none of our active users are affected by this change. In other words, there have been occasional hits to the site with older devices but for example IE 8 was registered on only 0.01% of all sessions during last 6 months, and Windows XP in 0.3% of the sessions, and are thus negligible. (note; Windows XP itself is still supported as the operating system makes no difference, but the combination of XP and old IE browser is not supported due to modern SSL connection requirements. With WinXP you should use Chrome or Firefox.)