After upgrading to Magento 1.9.3 from 188.8.131.52 the product image Uploade button is not working.
When I choose the image and clicks OK the browser just freezes and crashes. I tried again on Firefox, and gets the message that a script in js/lib/uploader/flow.min.js:2 is not responding.
I run PHP 5.6.27-1 on Ubuntu (So I cant install the html5 upload button from Magento Connect as this does not support over 5.6.25)
EDIT: It seems that the function can not get the max filesize (this.file.size / this.flowObj.opts.chunkSize) in this part of the function the chunkSize is 0 and I believe that is the reason for the crashing