I had a similar issue, not sure if this is the same thing. For me it worked in Internet Explorer, but just refreshes in Firefox.
Anyway, I finally found a solution for it that I thought I might share to help you guys. On the Options page where you enter the URL of your site I had written something like “mysite.com”. I changed this to “www.mysite.com” (ie, added “www.” before the address) and everything started to work.
I also use a redirect to forward the user to my page, and it seems to work no matter if I write mysite.com or https://www.mysite.com in the browser address field, as long as the address in the Options page contains www.
Hope this helps.
