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 2,102,626 websites that are selectivizr Customers. We know of 702,449 live websites using selectivizr and an additional 1,400,177 sites that used selectivizr historically and 374,677 websites in the United States.
Get a list of 2,102,626 websites using selectivizr which includes location information, hosting data, contact details, 702,449 currently live websites and an additional 308,838 domains that redirect to sites in this list. 1,400,177 sites that used this technology previously and 374,677 websites in the United States currently using selectivizr.