Is Firefox 60 ESR supported in SilkTest 18.5?

 Hi, guys

I just want to know whether Firefox 60 ESR is already supported by SilkTest or not.

I tried my script with Firefox 60 ESR, but I feel it is too slow to run.
Also, SilkTest can't find some dialog even though it is fine with Firefox 52 ESR.

Let me know if you have any clue.

Thank you in advance.

Naoya