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}

Could the conflict possibly be between TickeMaster and Duck-Duck-Go?

Disable the duck and see what happens.

Well, I made to TicketMaster check-out, but then the browser "froze" (or hung) up again and I was forced to use Task Manager to shut the program down again... Convinced TM is harvest additional info on me, on top of charging outrageously high ticket prices and assorted nose-bleed expensive fees.... I have no trouble with TicketFly, Stub Hub (a reseller, too), etc... Kind of annoying..

https://support.mozilla.org/en-US/kb/update-firefox-latest-version?cache=no Did you update Firefox to the latest version 65.0.2 February 28, 2019

yes.. Firefox is "up to date".