It looks like a regression in FF9+. Maybe this one in CSS: [https://bugzilla.mozilla.org/show_bug.cgi?id=714560 https://bugzilla.mozilla.org/show_bug.cgi?id=714560]. Try to spoof the user agent (see the last comment) and report if that helps.

Hi, Please try a '''Ctrl''' + '''F5''' refresh of the page. This would bring in the whole content afresh. ............................................................................................................................... Useful links: [https://support.mozilla.com/en-US/kb/Options%20window All about Tools > Options] [http://kb.mozillazine.org/About:config Going beyond Tools > Options - about:config] [http://kb.mozillazine.org/About:config_entries about:config Entries] [https://support.mozilla.com/en-US/kb/Page%20Info%20window Page Info] Tools (Alt + T) > Page Info, Right-click > View Page Info [https://support.mozilla.com/en-US/kb/Keyboard%20shortcuts Keyboard Shortcuts] [https://support.mozilla.com/en-US/kb/Viewing%20video%20in%20Firefox%20without%20a%20plugin Viewing Video without Plugins] [http://kb.mozillazine.org/Profile_folder_-_Firefox Firefox Profile Folder & Files] [https://developer.mozilla.org/en/Command_Line_Options#Browser Firefox Commands] [https://support.mozilla.com/en-US/kb/Basic%20Troubleshooting Basic Troubleshooting] [https://support.mozilla.com/en-US/kb/common-questions-after-upgrading-firefox-36 After Upgrading] [https://support.mozilla.com/en-US/kb/Safe%20Mode Safe Mode] [http://kb.mozillazine.org/Problematic_extensions Problematic Extensions] [https://support.mozilla.com/en-US/kb/Troubleshooting%20extensions%20and%20themes Troubleshooting Extensions and Themes] [https://support.mozilla.com/en-US/kb/Troubleshooting%20plugins Troubleshooting Plugins] [http://kb.mozillazine.org/Testing_plugins Testing Plugins]

This is caused by broken browser-sniffing by MediaWiki template software. See question 906789 or 908871. Updating the MediaWiki should solve this problem.

@-moz-document domain(oeis.org) { #column-content { margin-left:-12.2em !important; } }

A temporarily solution is to add code to userContent.css or Stylish to reset the margin-left to its correct setting to undo the change made by the extra stylesheet that gets loaded. *http://forums.mozillazine.org/viewtopic.php?f=25&t=2392487 *http://kb.mozillazine.org/userContent.css The customization files userChrome.css (interface) and userContent.css (websites) are located in the chrome folder in the user profile folder. *http://kb.mozillazine.org/Editing_configuration ---- <pre><nowiki>@-moz-document domain(oeis.org) { #column-content { margin-left:-12.2em !important; } } </nowiki></pre>