Catests.space is a dubious website, designed to proliferate a popular browser-based tactic. Via misleading and deceptive messages, the site tries to trick its visitors into clicking the 'Allow' button. By doing so, users will subscribe to the page's push notification services inadvertently. If successful, Catests.space will abuse it's newly acquire browser permissions to run an intrusive advertising campaign on the device.
The unwanted advertisements could take numerous different forms - banners, pop-ups, in-text links, etc., and might even begin to overlay the legitimate sites opened in the browser. Users who try to stop the advertisements from appearing by simply closing the browser will soon find out that they were unsuccessful. Keep in mind that engaging with the advertisements could lead to more questionable pages being opened in the browser.
The specific scenario that Catests.space employs also may vary. However, the page has been observed to pretend as if a file is ready for download. Alongside an image of a file, the deceptive site displays the following message:
'Download is ready. Click Allow to download your file'
Users who do not pay enough attention could easily be tricked by Catests.space. Afterward, to stop the activities of this dubious page, they will have to revoke all of the permissions given to it. Depending on the browser, this can usually be achieved by going to either the 'Permissions' or 'Notifications' menu.