Review for Google Search for Thunderbird by javaweasel
Rated 5 out of 5 stars
This plugin is exactly what I needed, after I spent an hour unsuccessfully messing around in my profile folder and about:config.
In response to the other reviewer, I've watched the net traffic using Wireshark, and this plugin does *not* 'phone home.' It goes right to Google.
To create your own collections, you must have a Mozilla Add-ons account.