I am having website error that I still do not know what causes it. In several of my users browsers (firefox), some words in the website content that I build turn into a blue link and also there is a Java ads in it.
Another one, index.html turns into index.css and the user cannot browse the website. Page not found. Other websites work just fine.
Any clue why? And what's the solution?
I code the website using pure PHP without any framework.