Version: 39.0.2256.71 - Opera is up to date
Update stream: Stable
System: Ubuntu 16.04.1 LTS (x86_64; Unity)
Using one window, every 10-15 minutes or so a small blank "pop-up" window opens - is totally blank with no webaddress - then closes after 1-2 seconds.
haven't made any changes. Standard UFW firewall, no intrusions. Ubuntu is A-Okay.
Extensions installed are:
AdBlock
Version 2.57
Black Menu for Google
Version 11.0.6
Ghostery
Version 5.4.10
Google Calendar
Version 3.1.1
HTTPS Everywhere
Version 2016.9.1
I don't care about cookies
Version 2.5.9
NoScript Suite Lite
Version 0.2.1
WOT
Version 3.0.0
Any ideas? Thanks!