Hi Jiří,
The following table shows which Firefox Browser Extension version we recommend using with which Blue Prism version as this has been evaluated and tested by our Product team:
Firefox integration was originally introduced in Blue Prism version 6.4.0; the Browser Extension version was 6.4.0.8445. Since then there have been significant improvements to make the plugin more robust and resilient.
I hope this helps.
------------------------------
Hossein Azimi
Customer Support Engineer, APAC
Blue Prism
Australia/Sydney
------------------------------