I am using Mozilla and just went in on a thread and clicked on Breitbart. It gave me the attack site warning.
I use CyberFox, a variation of Firefox. I just typed in Breitbart.com in the address bar. It opened without any problem.
I copied the link at the top an FR thread for breitbart.com^ and it opened fine.
I copied the link at the bottom of the initial FR thread description and it also opened fine.
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Some of this may have to do with specific browsers, including various extensions for Adblock, DoNotTrack, etc.