Tools | Options | Advanced | Config editor\\

user.js:

<code>
user_pref("mail.check_all_imap_folders_for_new", true);
user_pref("mail.server.default.check_all_folders_for_new", true);
user_pref("mail.imap.expunge_after_delete", true);
user_pref("mail.password_protect_local_cache", true);
user_pref("alerts.totalOpenTime", 4000);
user_pref("extensions.enigmail.addHeaders” , false);
user_pref("general.useragent.override", "");

user_pref("layout.word_select.eat_space_to_next_word", false);
user_pref("layout.word_select.stop_at_punctuation", false);
user_pref("browser.urlbar.clickSelectsAll", false);
#user_pref("browser.cache.disk.parent_directory", "/mnt/ramdisk");
user_pref("browser.cache.memory.capacity", 65535);
user_pref("browser.cache.offline.enable", false);
user_pref("browser.cache.disk.capacity", 65535);
user_pref("browser.cache.disk.enable", true);
user_pref("browser.cache.memory.enable", true);
user_pref("browser.cache.disk_cache_ssl", false);

user_pref("mailnews.reply_header_authorwrote", "%s ");
user_pref("mailnews.reply_header_locale", "sl_SI");
user_pref("mailnews.reply_header_ondate", "@ %s");
user_pref("mailnews.reply_header_separator", "");
user_pref("mailnews.reply_header_type", 3);

user_pref("network.http.sendRefererHeader", 1);
user_pref("privacy.donottrackheader.enabled", true);
user_pref("general.useragent.override", "");

user_pref("mailnews.default_sort_order", 1);
user_pref("mailnews.default_sort_type", 18);
user_pref("mailnews.default_view_flags", 1);
</code>

To apply sorting order to all folders you must delete index files in Thunderbird profile folder:

  find . -iname *.msf -exec rm -v '{}' \;
  


Usefull plugins:\\

  *[[http://www.thunderbird-mail.de/wiki/ConfigDate_(English)|ConfigDate]]
  *[[https://addons.mozilla.org/en-US/thunderbird/addon/2505| Duplicate Contact Manager]]
  *[[http://enigmail.mozdev.org/| Enigmail - PGP/GPG plugin]]
  *[[http://www.gnupg.org/download/| PGP/GPG package]]
  *[[http://www.mozilla.org/projects/calendar/releases/|Lightning - calendar]]
  *[[http://mailredirect.mozdev.org/|Mail redirect]]
  *[[http://quotecolors.mozdev.org/|Quote colors]]
<del>*[[https://addons.mozilla.org/en-US/thunderbird/addon/4654|Remove duplicate messages]]</del>  
  *[[https://removedupes.mozdev.org/|Remove duplicate messages]]
  *[[https://addons.mozilla.org/en-US/thunderbird/addon/1396|Sync on arrival]]
  *[[https://www.absorb.it/virtual-id|Virtual Identity]]
  *[[http://www.theodoretegos.net/mozilla/tb/|Xpunge]]
  *[[https://addons.mozilla.org/en-US/thunderbird/addon/auto-address-cleaner]]

  *[[http://ilpolipo.free.fr/addons/?sn=lnu| Lightning updater]]
  *[[http://code.google.com/p/oneclicksearch/|One Click Search]]

  *[[https://addons.mozilla.org/en-US/thunderbird/addon/258|Folder options]]
  *[[https://addons.mozilla.org/en-US/thunderbird/addon/2351|Toggle wordWrap in Composition]]
  *[[https://addons.mozilla.org/en-US/thunderbird/addon/4847|Restart Thunderbird]]