That is great news! One of the reasons we ask people to write into support is that browser version is sent automagically to help us debug, we had to replicate the issue first with FF 17 to verify that was the issue.
We try our best to follow similar support of browsers that other big internet companies follow which is supporting Major Browsers current and previous versions. Each time a new version is released we support that version and stop supporting the 3rd (or so) most recent version. The big 4 major browsers are Chrome, Internet Explorer, Firefox and Safari.
That is not to say that the game won't function on older versions or other browsers, but internal tests we can only test on most recent versions. On older versions performance and stability may be impacted as well as security concerns as a whole on the internet. So on FF 17 you were 6 versions back.
Thanks for being being patient with this one and upgrading FF.
Last edited: Oct 23, 2013