I am using FireFox and this error comming again and again

I am using Firefox and on playing macro this error “Error #101: UI.Vision RPA is not connected to a browser tab”.
Come again and again. Even the first “StoreTitle” is not working.
On restarting the UI Vision issue does not resolve.
When I restart Firefox along with UI Vision then it runs well about 2 to 3 times and then the issue starts happening.

Firefox version is not updated and has more bugs. Use chrome. 1 window only. I resolve the issue by having a dedicated portableapps version of chrome for my macros.