I had no problem with that link.

Many site issues can be caused by corrupt cookies or cache.

Warning ! ! This will log you out of sites you're logged in to. You may also lose any settings for that website.

• Delete cookies to remove the information websites have stored on your computer {web link}

• How to clear the Firefox cache {web link}

If there is still a problem, Start Firefox in Safe Mode {web link} by holding down the <Shift> (Mac=Options) key, and then starting Firefox.

A small dialog should appear. Click Start In Safe Mode (not Refresh). Did this help?

While you are in safe mode;

Try disabling graphics hardware acceleration in Firefox. Since this feature was added to Firefox it has gradually improved but there are still a few glitches.

How to disable Hardware Acceleration {web link}

Okay, so I think I may have narrowed down what is causing the issue. That specific Guitar Center page displays fine if I clear my settings and don't allow the website Location Access. But after I Allow Location Access, Firefox completely freezes up.

Anyone have any ideas on why Allowing Location Access would cause this page to completely freeze up Firefox?

I don't know. Perhaps post that as another question.

I posted a new question now that I know the issue is a more general one related to geolocation services in Firefox and not page specific. I noticed Firefox v65.0.2 included a bug fix for geolocation services affecting Windows users. It looks like they may have introduced a bug with that bug fix.