FileWave Clients have a process monitor component in fwcld, which is included in both macOS and Windows. Two sets of data are being provided from the device including the apps installed and running processes. Sometimes the list of installed MSIs say Firefox is installed but does not provide the installed process name. For instance, if the process name is Firefox.exe but in actual it is running another process named differently, such as Firefox-broswer.exe; in which FileWave fwcld process monitor does not see it.
You may review to see if the FileWave Client fwcld component is recording these by opening a sqlite DB browser under the process monitor component file location:
Windows: C:\ProgramData\ FileWave\ FWClient\appusage\appusage.db
Below is a screen shot of a device that shows the processes being monitored.