https://github.com/wikimedia/mediawiki-extensions-LiquidThreads/blob/master/lqt.js#L143
var isIE7 = $.browser.msie && $.browser.version.substr( 0, 1 ) === '7';
Version: unspecified
Severity: major
See Also:
https://bugzilla.wikimedia.org/show_bug.cgi?id=65666