The makers of all major browsers have agreed together a program for phasing out Flash by 2020, starting by making it more and more awkward to use. So, any difficulties you see may be part of that pattern, and any relief from another browser only temporary.
Here is Google's statement on Chrome, by the way: Saying goodbye to Flash in Chrome
Here are comparable announcements on FireFox https://blog.mozilla.org/futurereleases/2017/07/25/firefox-roadmap-flash-end-life/
and on Microsoft browsers The End of an Era – Next Steps for Adobe Flash - Microsoft Edge Dev BlogMicrosoft Edge Dev Blog
So... you should talk to Kronos about whether or not they have a non-Flash version, and what their plans are for making that move.
Aside from that, your options are pretty much limited to moving to a browser with a less aggressive stance on Flash Player.