I've had Firefox fail to work properly on the sites of Slashdot, Amazon, Newegg, Chase, BoA, GE, Walmart, the IRS, PennDOT, Mozilla's own org site, WaPo, NPR, F

I've had Firefox fail to work properly on the sites of Slashdot, Amazon, Newegg, Chase, BoA, GE, Walmart, the IRS, PennDOT, Mozilla's own org site, WaPo, NPR, Fox, Disney, and a whole host of others.