Is there an extension or option in Firefox for getting the IP of a host and then visiting the IP instead of the host?

Question

Let's suppose you don't have access to www.site.com, but if you open the IP of the site in Firefox instead of the host name, you can access without problems.

Is there an extension or something in Firefox, that before accessing a page, gets its IP and queries the IP instead of the host?

Or maybe a software in Windows?

I cannot use same IP all the time, because the IP changes during the day...

Answer 1

I can't find a plugin, though you can always do it the slow way and bookmark the ip of e.g. http://domaintoip.com/ip.php , then search the ip and click the resulting link.

But, why can't your computer resolve IP's to domain names? This sounds like a bad problem.