The information in this article applies to:
ZoomText 10.0.x and 10.1.x
Mozilla ThunderBird 31.1.2 or higher
When Starting Mozilla Thunderbird with ZoomText running Thunderbird would crash. This problem is related to the use of Hardware acceleration when available in Thunderbird.
Within Thunderbird Choose Options
Click the Advanced button > Config Editor Button
Click on the I will be careful I promise button
This will bring up the About:Config window
Search for: gfx.direct2d.disabled And set the value to be true (Double Click)
Search for: layers.acceleration.disabled And set the value to be true (Double Click)
Exit the About:config window
Click OK on the Options window
Exit and restart Thunderbird.