reinstall your smartview
Same issue for me, "opening webform in SmartView" it is not working with firefox (while working with IE11)
- Oracle SmartView addin from Firefox marketplace is installed & enabled
i haven't found anything related on the Oracle Support KB
The address wasn't understood
Firefox doesn't know how to open this address, because one of the following protocols (oraclesv) isn't associated with any program or is not allowed in this context.
You might need to install other software to open this address.
Oracle EPM 188.8.131.52.900 & HFM 184.108.40.206.208
Oracle Smart View for Office 220.127.116.11.900
Firefox Quantum ESR 60.6.1esr (32-bit)