Kerika works well on modern browsers, but we still occasionally get folks trying to sign up using an obsolete or very old browser. (For example, Internet Explorer is obsolete; you need to use Microsoft Edge.)

To handle this, Kerika checks the browser information returned by your computer when you try to sign up or login, to weed out the unsupported old browsers.

We have expanded this now to make sure organizations that are using Mozilla’s Extended Support Release (ESR) program to manage their Firefox deployments are not hindered.  Based upon this chart from Mozilla:

It looks like ESR 60.3.0 is equivalent to regular Firefox 63, so we now let people using this ESR (or newer) to use Kerika.