Hello, Tombaker!
Thank you for your report! To investigate the issue we will need more information.
Diagnostic info.
Steps:
1. Open the browser and click on the menu icon (3 dots)
2. Click on "Help and About Avast Secure Browser" and then "About Avast Secure Browser"
3. Click on "Diagnostic Information" (this will open a pop-up window)
4. Click the "COPY TO CLIPBOARD" button to capture the information and paste it here.
Thank you!