I use Safari on the ECF without any problems whatsoever. Use it on an iPhone, iPad and several Mac's. All are running the latest OS versions and current versions of Safari. I do not use any add-ons or plugins.
Perhaps you are running a version of Safari that Apple no longer supports.
See the
version compatibility notes.
The last version of Safari for Windows was 5.1.7, released in 2010 and now very outdated. It is no longer supported.
Try an alternate browser, there are many to choose from.