Many site issues can be caused by corrupt cookies or cache. In order to try to fix these problems, the first step is to clear both cookies and the cache. Note: This will temporarily log you out of all sites you're logged in to. To clear cache and cookies do the following:

1. Go to Firefox > History > Clear recent history or (if no Firefox button is shown) go to Tools > Clear recent history.
2. Under "Time range to clear", select "Everything".
3. Now, click the arrow next to Details to toggle the Details list active.
4. From the details list, check Cache and Cookies and uncheck everything else.
5. Now click the Clear now button.

Further information can be found in the Clear your cache, history and other personal information in Firefox article.

Did this fix your problems? Please report back to us!

Thank you for the response. I have tried deleting the cache and cookies and I still have the same problem. Are you able to view that website correctly on Firefox?

The site appears to be using an older 1.2.0 version of MooTools that is not compatible with curent Firefox releases.

• http://stevenson.edu/includes/mootools.js

• http://www.mozilla.org/en-US/firefox/18.0/releasenotes/

Quote: Mootools 1.2.x incompatible with Firefox 18 and newer.Fixed in Mootools 1.3 and newer (see 789036)

• bug 789036 - MooTools 1.2.x was broken by adding String.prototype.contains

(please do not comment in bug reports: https://bugzilla.mozilla.org/page.cgi?id=etiquette.html)

Great, thanks. I just wanted to make sure that nothing was wrong with my installation of Firefox or with my computer. I appreciate the help.