Hello everyone, I've encountered a strange issue with certain websites from my university and on my localhost. As part of learning web development, I have been studying HTML and CSS. However, I recently discovered a suspicious CSS tag in the header section of these sites, containing unusual references that seem sketchy and possibly fraudulent. Upon further inspection, I noticed that some of these links lead to adult content or tracking websites based on their names. Strangely, this problem only occurs on the university-assigned sites where I complete tasks, as well as on my local machine when working on my own website using Spring and IntelliJ.
This discovery has left me feeling uneasy. I primarily use the Opera GX browser, but I decided to test this behavior on Firefox as well, only to find that the mysterious style tag was absent there. The tag begins with unusual root tags and hrefs. Does anyone have any insight into what may be causing this?
Curious about whether this issue extended beyond my main computer, I also checked my laptop running Opera GX, and sure enough, the bizarre style tag was present there too. Unfortunately, my attempts to find a solution through Google were unsuccessful.