When trying to access I get the following for https://www.ncbi.nlm.nih.gov/pubmed/
Hmm. We’re having trouble finding that site.
We can’t connect to the server at www.ncbi.nlm.nih.gov.
If that address is correct, here are three other things you can try:
Try again later.
Check your network connection.
If you are connected but behind a firewall, check that Firefox has permission to access the Web
Anyone else?. I can access other sites