Formatting text (bold, italics, etc) in webmail client does not work in Firefox; works in IE and Chrome

Question

I use the Smarsh webmail client for my company's email service.
I have been using Firefox in the office for quite some time, and only recently has this issue come up.
When composing emails using the Smarsh client, I cannot format text (using bold, italics, or underline) using the buttons built in to the client. When I highlight text and click a formatting button, the cursor just moves to the end of the line.
Using keyboard shortcuts to edit the formatting works sometimes, but is sporadic (sometimes formatting PREVIOUSLY selected text but not the currently selected text).
I have tried downgrading to Firefox 16, 17, and 18 (as this problem has only come up in the last couple of weeks, and Firefox 19 was release I believe on 2/13), but this did not solve the problem either.

Answer 1

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