Using FF 75.0 and SB 5.31.6 64b runs fine on my W10 pc but today on another W 8.1 laptop it gave the error XULRunner, Error: Platform version 75.0 not compatible with minVersion 74.0 maxVersion 74.0. I reinstalled FF and FB. Then gave the same error. But this afternoon the new shortcut opens SB + FF fine.
Just wondering why it took a number of hours to run correctly after I deleted old settings (no add-ons) and reinstalled both appl's. Odd.
Thanks,
Mac