Hi Ibuyasiancollectibles,
Thanks for the clarification. I am not aware of any technical issues that would prevent you from using the description editor through Firefox, so I suspect there is something unusual on your end (or with the text you are trying to copy/paste) that is conflicting with the editor.
In that case, the first thing I recommend trying which may resolve the issue you are experiencing is clearing your browser cache, which can be done via the following process in the later versions of Firefox:
Please click on the 'Firefox' menu button at the top left of the browser and then mouse over the 'History' menu on the right side of the resulting pop up menu. Click on "Clear recent History..." and ensure the boxes next to "cache" and "cookies" are checked, and then click the "Clear Now" button.
Also, please ensure that only one browser window is open when you are doing this or your cache may not empty properly.
If you continue to encounter the same behavior after doing so, please file a support case from under the “Help” tab within your account and we will be happy to continue working with you. I feel it is best not to discuss any specific account details on this public forum.
-Mike