Found out what the ‘bug’ was…

After reinstalling Avast from scratch, and starting FF, it ran properly within the sandbox. (~1% CPU usage).

I then changed my settings to what I usually use, and voila… the bug returns! – turns out that if you set the “show tags” instead of “show borders” in the sandbox expert settings, everything running in the sandbox will take 50% cpu usage.

So hope this helps solve this bug :).

Just curious if anyone else could try it and tell me if they have the same issue or not. Would be much appreciated.

Regards,

R