I have a page where I'm trying to use Jquery's $.get() to make a call to a long running import script. In this script it updates a database with how far through the process it is (i.e. 2%, 4% etc). I have another $.get() call (to check on the progress) which is setup through a setTimeout before the first $.get() is fired.
The problem I'm having is the $.get() call to check on progress never returns until the long running import $.get() returns. This doesn't seem to be right as they should be async.
As far as I can see the "check progress" URL is hanging if I launch it in a new tab within firefox, but if I load this in Chrome it returns instantly. As far as I know firefox should be able to run more than 1 AJAX call per hostname without a problem.
In Chrome with the developer tools enabled I see the "check progress" URL call as "pending" until the first one completes.
How can I get both requests to run async?