selectivizr is a JavaScript utility that emulates CSS3 pseudo-classes and attribute selectors in Internet Explorer 6-8.
http://selectivizr.com/
JavaScript Libraries and Functions · Compatibility
Get access to data on 2,384,980 websites that are selectivizr Customers. We know of 756,398 live websites using selectivizr and an additional 1,628,582 sites that used selectivizr historically and 391,786 websites in the United States.
Get a list of 2,384,980 websites using selectivizr which includes location information, hosting data, contact details, 756,398 currently live websites and an additional 315,006 domains that redirect to sites in this list. 1,628,582 sites that used this technology previously and 391,786 websites in the United States currently using selectivizr.