Since Provance ITSM rides on top of Dynamics 365 (D365) then ITSM should support the D365 supported browsers.  From research at the links below D365 supports Windows 10 with Internet Explorer 11 but does not support Mozilla Firefox ESR versions. 

https://docs.microsoft.com/en-us/dynamics365/customer-engagement/admin/supported-web-browsers-and-mobile-devices
https://docs.microsoft.com/en-us/dynamics365/customer-engagement/admin/web-application-requirements
https://docs.microsoft.com/en-us/dynamics365/customer-engagement/customer-service/customer-service-hub-user-guide-basics