Sick of "Wait for Availability" text on button on Browser Back in Indian Railways Site?
Initially I too was since my favorite browser is Firefox. In fact it one of the most popular browser in the world! Same problem with Opera too.
It turns out it is caused by a bug in their javascript as Indian Railways has not tested/corrected their website against even main browsers. How much of nagging it is!
This problem does not come with Internet Explorer 9, Maxthon v3.4, Chrome etc. Remember avoid using Windows Internet Explorer. I'd suggest you go for Google Chrome first.