I usually browse multiple pages at once. While one page is busy loading I like to switch tabs and read another page. The problem Ive recently encountered is that whenever there is a page redirect firefox will wait until the tab is active before following it. For example sometimes when Im posting a message to a support forum (lets say forums.fedoraforum.org as just one specific example) it will submit my message and then try to redirect me back to the thread that I was posting to. I often switch tabs right after I click submit and expect the page to be loaded when I come back, but to my disdain firefox will wait until the tab is active before following the redirect, thus when I switch back it still has not even started loading the page yet. I was hoping maybe there is an about:config setting or something that will allow firefox to follow these redirects while the tab is inactive?