If you mean, when the site loads the first time, it keeps reloading?

If that's it, it's often due to you not allowing cookies. Less often, it might be if java script is blocked (on that site's base domain: sporx.com.

OR... could be that some java script on the site IS causing the problem. Whether the site's own scripts, or an allowed 3rd party (tracker, advertiser, etc.). If that's the problem, the solution is likely use NoScript addon, then you can pick / choose which scripts, coming from which URL (company) you want to allow.

Could also use Ghostery to block most of the known trackers, advertisers from loading scripts when you visit pages.

I'm just giving different things I've seen cause a similar problem.

You can allow only temporary cookies - if you use a simple cookie manager, like Cookie Monster, or a bit more complex, Cookie Controller. Both good. Both allow setting "temporary" cookies, that will be deleted, when Fx closes. As well as Session cookies & Permanent, plus other options, not included or hard(er) to with in Fx options.

Or, if you want to allow the site to set cookies, each time you visit, you can allow session cookies (with or w/o using a cookie mgr).

While reading text on the page, a page that refreshes every 30 seconds. For this reason, I have difficulty reading. How can I stop refresh function?