MediaWiki extensions manual
Release status: beta
Implementation User interface
Description Adds a warning when a user is using Internet Explorer or Microsoft Edge.
Author(s) Matthew Trescott (MTres19talk)
Latest version 1.0 (2017-03-14)
MediaWiki 1.25+
License GNU Affero General Public License 3.0
Example https://supertuxkart.net

  • $wgIEWarnOuterBoxStyle
  • $wgIEWarnInnerMessageStyle
  • $wgIEWarnCustomOuterBoxTitle
  • $wgIEWarnCustomMessage

The IEWarn extension displays a warning to users of Internet Explorer and Microsoft Edge browsers. Useful for wikis with skins that aren't compatible with IE/Edge's quirks.


  • Download and move the extracted IEWarn folder to your extensions/ directory.
    Developers and code contributors should install the extension from Git instead, using:cd extensions/
    git clone https://gerrit.wikimedia.org/r/mediawiki/extensions/IEWarn
  • Add the following code at the bottom of your LocalSettings.php file:
    wfLoadExtension( 'IEWarn' );
  •   Done – Navigate to Special:Version on your wiki to verify that the extension is successfully installed.



These options can be set in LocalSettings.php :

$wgIEWarnOuterBoxStyle = 'CSS styling to determine the style of the header containing the title. Contains styling already, so unneeded unless you want customization.';

$wgIEWarnInnerMessageStyle = 'CSS styling to determine the style of the message underneath the header. Already contains styling, so unneeded unless you want customization.';

$wgIEWarnCustomOuterBoxTitle = 'Custom (non-localized) title. You can also edit the MediaWiki:Iewarn-ie-title page.';

$wgIEWarnCustomMessage = 'Custom non-localized message. You can also edit the MediaWiki:Iewarn-ie-message page and include the $1 parameter where you want the name of the browser (Internet Explorer/Microsoft Edge).';