''<p>Dropa [[#answer-1537233|said]]</p>'' <blockquote>Addon issue is best direct to the Addon developers. FireFox hosts the Addons but don't provide support for them. </blockquote> Again people are still welcome to ask for help here as it is not expected for a Firefox user to ask the Extension author for help directly. Also some of the Extensions hosted on A.M.O are actually Mozilla authored extensions. Also the web browser Firefox does not host any Extensions as that is Mozilla. Not sure which Blocksite Extension you installed as there is at least two https://addons.mozilla.org/firefox/addon/blocksite/ https://addons.mozilla.org/firefox/addon/block-website/ depending on which one you installed, their sites for more information are at https://add0n.com/block-site.html https://blocksite.co/