Expression Search is a Thunderbird addon that add search features like Gmail

Powerful message searching through expressions. Type "from:fred to:tom" to see all messages from Fred to Tom in the current view. Support 'regular expressions' and 'click to search'.

The Addon can be installed from AMO: https://addons.thunderbird.net/en-US/thunderbird/addon/gmailui/

Documentation for the latest version can be found at: https://cdn.rawgit.com/wangvisual/expression-search/master/content/help.html

Documentation for the original version (0.1~0.6) can be found at: http://sites.google.com/site/kmixter/gmailui

Add-ons created/maintained by me:

• Expression Search / GMailUI Powerful message searching through expressions. Type "from:fred to:tom" to see all messages from Fred to Tom in the current view
• Awesome ldapInfoShow Showing LDAP/Facebook/LinkedIn information
• Awesome Auto Archive Automatically do Archive/Copy/Delete/Move actions based on user defined rules