Both my Leap installations are getting the following msg:
The page isn’t redirecting properly
*Firefox has detected that the server is redirecting the request for this address in a way that will never complete.
This problem can sometimes be caused by disabling or refusing to accept cookies.*
No problems on other computers. Is the latest Firefox on OpenSUSE problematic?
You better explain if this is on all pages you try, or only on a particular one, and then of course you tell us which one.
I sometimes get that message when going to “forums.opensuse.org”. It also happens with konqueror, and probably other browsers (for “forums.opensuse.org”). I have occasionally seen it at other sites, though that is rare.
As far as I know, it is more a site issue.
When you login to opensuse forums, you are redirected to a “microfocus” site to login and add a cookies. Then you are redirected back to the forums to add a “opensuse.org” cookie. I assume that the two cookies are sometimes out of sync, and that causes the redirection loop.
When that happens here, there are several option:
Sorry. So far, it is only occurring with eBay.ca when I click on a link in eBay.
No problem with other browsers or OSs.
I’ve removed all eBay cookies.
Basically, I got rid of problem by deleting my .mozilla/firefox directory.
Rather drastic… 
but hey, it’s your Firefox.