Suddenly blocking a website that security is set to allow.
This evening Firefox suddenly started blocking breitbart.com and all of it's subsidiaries.
Under Tools, Options, Security - breitbart.com is set to "Allow".
If I uncheck the "Block reported Attack sites" box then I can access all of the Breitbart sites. Obviously this is not a desired solution.
Firefox/Tools > Options/Preferences > Advanced > General : Accessibility : [ ] "Warn me when web sites try to redirect or reload the page"
The setting in "Tools > Options > Advanced > General" is meant as an accessibility feature, as you can see by the label of that section, so that people with disabilities or people who use screen readers do not get confused and is not meant as a safety protection to stop redirecting.