About this Add-on
The addon does not mess with Thunderbird configuration in any way. It simply hides the web search when you start typing.
The solution was taken from : http://forums.mozillazine.org/viewtopic.php?f=39&t=2420963
To create your own collections, you must have a Mozilla Add-ons account.
Some add-ons ask for permission to perform certain functions. Since you’re in control of your Firefox, the choice to grant or deny these requests is yours.
Please note this add-on uses legacy technology, which gives it access to all browser functions and data without requesting your permission.