If you are not sure if the website you want to visit is safe, you can check it out here. Enter the address (url) of the website and see the invisible elements, such as a header or meta data.
site address:s0.2mdn.net/ads/studio/cached_libs/tweenmax_1.19.0_643d6911392a3398cb1607993edabfa7_min.j...

Header

HTTP/1.1 200 OK
Accept-Ranges bytes
Vary Accept-Encoding
Content-Encoding gzip
Content-Type text/javascript
Content-Length 37530
Access-Control-Allow-Origin *
Timing-Allow-Origin *
Date Tue, 12 Dec 2017 00:42:41 GMT
Expires Tue, 12 Dec 2017 00:42:41 GMT
Cache-Control public, max-age=0
Last-Modified Tue, 06 Sep 2016 20:51:14 GMT
X-Content-Type-Options nosniff
Server sffe
X-XSS-Protection 1; mode=block

Load Info

page size37530
load time (s)0.007682
redirect count0
speed download0
server IP216.58.198.198


* all occurrences of the string "http://" have been changed to "htt???/"