What Is Browser-tools.systems?
If new tabs pop up on your browser from time to time with various suspicious sites, among them https://browser-tools.systems (or a subdomain of that site: v1.browser-tools.systems, v2.browser-tools.systems, v3.browser-tools.systems, v4.browser-tools.systems, v5.browser-tools.systems, v6.browser-tools.systems, v7.browser-tools.systems, etc.) that wants you to allow it to show notifications, that is adware’s doing. This adware has probably been installed on your PC together with some free or pirated program. If you allow notifications, they may be hard to delete afterwards, as the adware changes Chrome’s Policy settings to make notifications “enforced by administrator”. Some of these notifications may “remind” you about browser updates and prompt you to install those. Don’t do it, Chrome and other popular browsers update automatically and won’t ask you to update via notifications or web-pages. You may follow instructions below to remove the adware and stop Browser-tools.systems pop-ups and notifications.