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 2,229,574 websites that are selectivizr Customers. We know of 813,777 live websites using selectivizr and an additional 1,415,797 sites that used selectivizr historically and 429,287 websites in the United States.
Get a list of 2,229,574 websites using selectivizr which includes location information, hosting data, contact details, 813,777 currently live websites and an additional 341,818 domains that redirect to sites in this list. 1,415,797 sites that used this technology previously and 429,287 websites in the United States currently using selectivizr.