Just woke up this morning with this infection. Normally don't run AV software other than Windows defender. Turned my computer on this morning and opened my firefox and my browser was clearly hijacked. Voice going "Critical alert from Microsoft" etc etc, unclosable log-in/sign-up credential pop up and fake alert boxes, crashing plugins, unclosable browser window.
Used Chrome to grab MBAM and the scan showed nothing, but it was constantly blocking a website redirect from redirector.gvt1.com for 5 minutes or so before it went silent. Scan report immediately after showed nothing. A restart and a firefox browser reset later, I tried opening firefox without MBAM running, and there was no redirect. Opened up MBAM and a repeat scan showed nothing, but a few minutes later, it blocked two more redirect attempts. Definitely still lurking around.