Looking further, if you click on one of the links below, like the security link, it will bring to you to the official github security page.
Then, if you fill in anything for a name and password, like shown below, it will just forward you to githubs own homepage (were you can notice that your still not logged in)
@nikolal good to know thay default firefox block it.
@blacklight447 Firefox block that for me, but I opened link on computer