Long e-mails are not displayed properly in Yahoo Mail in Firefox 18.
Since upgrading to Firefox v.18, e-mail messages which are particularly long (Gizmag for example) are displayed over the bottom "tool bar" (Delete, Reply, Forward, Spam, Move) in Rogers Yahoo! Mail Classic.
There seems to be a threshold at which the fixed elements of the page like the bottom tool bar will not extend which did not exist in Firefox v.12 which was the version of Firefox I was using until I upgraded three days ago which is when this problem started.
Re: Long e-mails are not displayed properly in Yahoo Mail in Firefox 18.
The Reset Firefox feature can fix many issues by restoring Firefox to its factory default state while saving your essential information.
Note: This will cause you to lose any Extensions, Open websites, and some Preferences.
To Reset Firefox do the following:
Go to Firefox > Help > Troubleshooting Information.
Click the "Reset Firefox" button.
Firefox will close and reset. After Firefox is done, it will show a window with the information that is imported. Click Finish.
Firefox will open with all factory defaults applied.