Hi Abshirely
We are already working on this issue. It was already reported here:https://forum.avast.com/index.php?topic=235407.0
In order to solve this issue, you have to:
1) open the bank mode using ctrl + b or right-clicking the Avast icon on taskbar and select "Run bank mode"
2) in bank mode go to secure://settings/
3) Disable lunch on startup in this browser.
I hope this does solve your problem, but please, tell us in case it does not, so we can take a deeper look into it.