Somewhere between Thunderbird 1.5 and Thunderbird 2 the message search bar disappeared. This extension restores the search bar. Thunderbird 2 and newer only

Version 0.5 (2009-08-14):
Compatibility: Thunderbird 2.0 to Thunderbird 3.0b3.
xsearchbar-0.5.xpi

Version 0.4 (2008-12-08):
Compatibility: Thunderbird 2.0 to Thunderbird 3.0b2.
xsearchbar-0.4.xpi

Version 0.3 (2007-08-04):
xsearchbar-0.3.xpi

Version 0.2 (2007-06-05):
xsearchbar-0.2.xpi

Version 0.1 (2007-06-01):
xsearchbar-0.1.xpi

• [enh] Tweak toolbar button code for toolkit 1.9.1.
• [fix] Remove extra toolbarspring that seems to crop up in TB 2.0.
• [fix] TB30b3: In tabmail mode, hide the search bar when the focused tab is not a 3pane tab.
• Update locales from Babelzilla and added new locales: ar, ms-MY, ru-RU, sr-RS, zh-CN.

2008-12-08: xSearchbar v0.4:

• Add ca-AD, cs-CZ, he-IL, mk-MK, pl-PL, pt-BR, tr-TR, and uk-UA locales from Babelzilla.
• Bump Thunderbird maxVersion to 3.1.*.
• Use toolbar API to remove buttons from the toolbars, don't make assumptions about the internal toolbar workings. This is preparation for changes in toolbar customization in 3.0b2+.

2007-08-04: xSearchbar v0.3:

• Added translations from Babelzilla.
• Added a default preference for the localized description.
• Added a skin directory and used some CSS to make the height of the view picker closer to that of the searchbox.

2007-08-04: xSearchbar v0.3:

• Added translations from Babelzilla.
• Added a default preference for the localized description.
• Added a skin directory and used some CSS to make the height of the view picker closer to that of the searchbox.

2007-06-05: xSearchbar v0.2:

• Added the View->Toolbars->Search Bar menu item.
• Remove the Views and QuickSearch toolbar buttons from the main toolbox palette so it doesn't show up in the Customize window.

2007-06-01: xSearchbar v0.1:

• Initial release v0.1:

• Q. It would be nice if the size of the QuickSearch box could be controlled as it becomes quite large when Thunderbird is used full screen.

  If you have the Stylish extension installed you could create a rule such as:

  @namespace url(http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul);
  
  #xsb-search-bar2 > #search-container
  {
   max-width: 300px;
  }
  

  If not you can always put this in your userChrome.css file:

  #xsb-search-bar2 > #search-container
  {
   max-width: 300px;
  }