Firefox Question

I have Windows 7 on this computer and use Firefox on about 31.1 update now. Switched emails accounts awhile back. Dumped Earthlink and now have a gmail account. When I open a RVnet email in the gmail account, click on it to open the thread, it opens to a new window and a message pops up at the top "Firefox prevented this page from automatically redirecting to another page". Far right side is a button to allow or an X not cancel. I have to click on the allow to open the RV.Net thread. Have seen this happen before from other websites but always went to that website. My question how & where in the Firefox tools or settings can I set it to automatically redirect the page to open. Pain in the Gluteous Maximus have to always click on the allow button. Any help with this matter appreciated.


Thanks
Milo