15 July, 2011 firefox javascript At work we include a third-party JavaScript library on our pages so we can run A/B and multivariate testing, and this code requires at least jQuery 1.4.0. Unfortunately we have more than a few dark corners of our site that are still dependent on an old (1.2.x) version of jQuery, so I had to find a way to detect the version of jQuery and not invoke the A/B testing c