Let's break browsers: If usest iPhone, it is better not to visit the page crashsafari.com. The page will stop mode του προγράμματος περιήγησης σας ή ακόμα και της ίδιας της συσκευής. Όμως δεν επηρρεάζεται μόνο το iPhone και ο Safari, the tests we performed with other browsers on Ubuntu, showed that the problem exists on other platforms as well. 
The site seems to use JavaScript and crashes iPhone 6S, 5S running with iOS 9.2.1, or 9.2. In other words, if you use one of the latest iPhone you are probably affected.
If you land on the website, it will show that it is loading, and then Safari will crash or force your iPhone to restartmovement. Depending on your settings, you may lose some of your open tabs, but your device won't be damaged.
The page will crawl and desktop versions of Safari. We also tested with Chrome and Firefox on Ubuntu desktop and the results were the same, both browsers failed to load the page while Chrome cracked.
So make sure you do not open the site if you see it becoming viral on social media. Also watch the links using shorteners.
We did not try to open the Windows page, if you try it, please let us know the results.
