The warning that Firefox shows when websites redirect or reload the page is blocked can no longer be controlled via Settings. You can set this pref on the <b>about:config</b> page to false to disable this feature. *accessibility.blockautorefresh = false You can open the <b>about:config</b> page via the location/address bar. On the warning page, click "Accept the Risk and Continue" to open about:config. *https://support.mozilla.org/en-US/kb/about-config-editor-firefox