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

• Clear the Cache and

• Remove Cookies
  Warning ! ! This will log you out of sites you're logged in to.

Type about:preferences<Enter> in the address bar.

• Cookies; Select Privacy. Under History, select Firefox will Use Custom Settings. Press the button on the right side called Show Cookies. Use the search bar to look for the site. Note; There may be more than one entry. Remove All of them.
• Cache; Select Advanced > Network. Across from Cached Web Content, Press Clear Now.

If there is still a problem, Start Firefox in Safe Mode {web link} A small dialog should appear. Click Start In Safe Mode (not Refresh). While you are in safe mode;

Type about:preferences#advanced<Enter> in the address bar.

Under Advanced, Select General. Look for and turn off Use Hardware Acceleration.

Poke around safe websites. Are there any problems?

Then restart.

What do you see where the prices normally appear? I have attached a screenshot of how it looks for me.

One reason the embedded (framed) Eventbrite ticket page behaves oddly -- I can't select text normally, for example -- is that Firefox 49 started applying some rules designed for Google Chrome and other browsers that were based on the webkit software. If you disable that new feature, the site may work slightly better for you. Here's how:

(1) In a new tab, type or paste about:config in the address bar and press Enter/Return. Click the button promising to be careful.

(2) In the search box above the list, type or paste webk and pause while the list is filtered

(3) Double-click the layout.css.prefixes.webkit preference to switch the value from true to false, then reload the problem page