Musescore download not opening after updating Firefox

• Feb 13, 2019 - 21:09
Reported version
3.0
Type
Functional
Frequency
Once
Severity
S1 - Blocker
Reproducibility
Always
Status
duplicate
Regression
Yes
Workaround
No
Project

Musescore can't be opened after it was downloaded and working fine yesterday, prior to Firefox update.
Dialog box says re-download; I'm not able to open it after re-download either.