SOLVED: Gmail and Google Apps Mail stopped working in Firefox and Chrome

For those of you who use Firefox or Chrome, Gmail, the AdBlock Plus extension and are experiencing problems accessing your mail via the browser.  Here is the simple solution for you:

AdBlock Plus was causing the issue of not seeing GMail content in the email messages.  All you have to do is update your AdBlock Plus+ subscriptions.

• In Firefox – Go to:

Tools > Add Ons > AdBlock Plus Options > Filters > Update All Subscriptions

• In Chrome – Go to:

The Wrench Icon > Tools > Extensions > AdBlock Plus > Options > Update Now

AdBlock Plus was causing the issue of not seeing GMail content in the email messages and for the Chat app to not display correctly.  Updating the subscription will clear the message content to be viewable immediately after you refresh your email.  The credit for this solution goes to user waynecz in the Google Forums for this answer!