I'm a markdown fan, and there is a very useful tool named Typora (It is free but not open source).
When I went to its official website to download it, there was neither animation nor complicated service. However my cooling-fans on my computer ran in full-speed when I visit this site. And when I open the task manager I saw a whole core are eaten up. What does this website do? Is there a bitcoin miner in JavaScript included in the source code?
In addition, does Typora itself have the same kind of problems?
Are there any useful tools to analyze the behavior of a certain website or a software?