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Consumer Products => Avast Free Antivirus / Premium Security (legacy Pro Antivirus, Internet Security, Premier) => Topic started by: cloudSVR on March 05, 2019, 07:37:41 AM

Title: Avast restarts Firefox?
Post by: cloudSVR on March 05, 2019, 07:37:41 AM
Windows 7 Ultimate SP1 64-bit
Program version: 19.2.2364 with latest definitions.


At random times I get this message and when I click OK Firefox restarts itself. I actually reinstalled Avast making the message gone but the random restarts still happen just without the prompt. What can be done to fix this?
Title: Re: Avast restarts Firefox?
Post by: bob3160 on March 05, 2019, 02:23:46 PM

Repair Avast:
Control Panel> Program and Features (Add/remove program)>Select Avast> Select Repair. Reboot when completed
If Repair doesn't fix the problem, try the following:
Clean Install of Avast:
Title: Re: Avast restarts Firefox?
Post by: cloudSVR on March 13, 2019, 12:02:10 PM
Sorry for the delayed reply but I tried both steps and I still get the same problem, I guess it's Firefox causing it I'll try re-installing thanks.
Title: Re: Avast restarts Firefox?
Post by: kwiq on March 13, 2019, 12:46:37 PM
Hi cloudSVR
Try to update to new vps version and restart Firefox.
CloseBrowser is one of exported functions from bcuengin.dll.

If the issue will happen again please zip bcuengin.dll as cloudSVR_3_13_2019_bcuengin.dll.zip and upload to ftp://ftp.avast.com/incoming

Which version of firefox you have and is it x86 of x64?
Thank you for report !

Title: Re: Avast restarts Firefox?
Post by: just52 on April 23, 2019, 02:25:08 PM
I have the same problem since start of March 2019 (approximately)
I have had the message shown by cloudSVR but now with the last versions of avast and firefox, i haven't the message anymore
When i had the message i could see that bcuengine.dll was launched by avastsvc through rundll32.
As soon as i clicked on the ok button, firefox was closed.

Twice a day, every 12 hours approximately, firefox closes and restarts (sometimes it doesn't restart)
I uninstalled avast (using avast uninstall tool) and reinstalled it but the problem is still here.
I tried deactivating all firefox extensions, i also tried to deactivate all avast agents but the problem was still here.
If i use google chrome and define it as default browser instead of firefox, there is no such behaviour.

My current versions :
Windows 7 professionnal 64 bits (up to date)
avast 19.4.2374 (version 19.4.4318.455)
vps 190423-0
firefox 66.0.3 (64 bits)