Stmasunwri.top is an Internet tactic designed to run third-party promotional campaigns. When people visit the page, they see no content but a series of fake error messages with different texts. These pop-ups have the final goal of making the user click on a given "Allow" button and accept push-notifications from Stmasunwri.top. Once a visitor has subscribed to these browser notifications, the website starts spamming the subscriber's device with countless advertisements and banners. The number of these pop-ups can be so extreme that it may even interfere with the device's normal performance.
However, Stmasunwri.top pop-ups can cause many additional issues. Many of them contain corrupted scripts that can download malware stealthily on users' computers. Other potentially harmful scripts injected into Stmasunwri.top banners can redirect the user to untrusty websites that may offer online gambling services, adult content or Potentially Unwanted Programs (PUPs).
In any case, affected users should delete this website's browser notifications permission immediately. Ideally, they also should scan their computers for malware. Adware threats also cause undesired pop-ups while gathering the user's data in the background. They infect computers unnoticed, hijack the browser, and then open rogue websites like Stmasunwri.top when users surf on the Internet.