Canon's site doesn't list any firmware updates to the SX60.
I had forgotten to check with the CHDK effort and it looks like they did finally dive into this camera, so maybe you'll find something there? It's still in Alpha though. Glad to see they are messing with it, it might add some interesting functionality/improvements (not sure IQ/IS will be one of them).
What issue are you having? Or did we already cover it way back in this thread?
We covered my problem with the SX60 in a bunch of posts long ago (Dec.7-9 2016 in this topic). I purchased an SX60 fairly early on and when I did side by side testing between my SX50's and the SX60 I found that the IS on the SX60 very much inferior to the SX50 so I returned the SX60.
Unfortunately though my SX50's are all starting to show age. Sticky zoom buttons, lens failure glitches, etc.. stuff you expect with well used mechanical parts. So I am considering my options again.