userchrome.css
/* Attachment pane at bottom of message window */
#attachmentView {
  -moz-appearance: none !important;
  height: 40px !important;
  overflow: auto !important; }

/* hide go button */
#go-button {
  display: none !important; }

#mail-menubar > menu {
  font-size: 12pt !important
}
#compose-menubar > menu {
  font-size: 12pt !important
}
statusbarpanel {
  font-size: 12pt !important
}
menupopup > * {
  font-size: 12pt !important
}
#urlbar {
   font-family: monospace !important;
   font-size: 13pt !important;
}
#throbber-box {
  display: none !important;
}
#folderTree {
  font-size:   12pt !important;
}
#threadTree {
  font-size:   12pt   !important;
}

treechildren:-moz-tree-cell-text(read) {
  font-size: 12pt !important;
}

treechildren:-moz-tree-cell-text(unread) {
  font-size: 12pt !important;
}

#msgHeaderView {
    max-height: 15em !important;
    overflow: auto !important; }

#header-box {
    font-size: 12pt !important;
}
#subject-box {
    font-size: 12pt !important;
}
usercontent.css
.moz-text-flowed, .moz-text-plain, .moz-text-html {
  font-size: 12pt !important;
}

body {
	font-size: 12pt !important;
}

/* Disable horizontal bars beside quoted texts */
blockquote[type=cite] {
	padding: 0 !important;
	border: 0 !important;
}
prefs.js
user_pref("mail.server.server1.max_cached_connections", 5); 

# show user agent:

user_pref("mailnews.headers.showUserAgent", true);

# use default system color:

user_pref("browser.display.use_system_colors",truye);

# change location of bookmark file:

user_pref("browser.bookmarks.file", "d:\\manwai\\bookmarks.html");

# For Firefox 3.0 and after...
user_pref("browser.bookmarks.autoExportHTML", True);

#http://www.hmetzger.de/net6e.html#7
#
# use traditional display of quotes
user_pref("mail.quoted_graphical", false);
user_pref("mail.quoteasblock", false);
user_pref("mailnews.display.disable_format_flowed_support", true);

# pretend to be a netscape 4
user_pref("general.useragent.override","Mozilla/4.0 (compatible; MSIE 6.0; Windows 98)")

# stop format=flowed when reading messsages
user_pref("mailnews.display.disable_format_flowed_support", true);

# stop format=flowed when sending messsages
user_pref("mailnews.send_plaintext_flowed", false);

# change the attribution line
user_pref("mailnews.reply_header_type", 2);
user_pref("mailnews.reply_header_authorwrote", "%s spoke thusly");
user_pref("mailnews.reply_header_separator", " ");
user_pref("mailnews.reply_header_colon", "
"); # duping all startup options and values netscp6.exe -help > c:\ temp.txt # wrap long line user_pref("view_source.wrap_long_lines", true); # minimum size of fonts user_pref("font.minimum-size.x-western", 13); #disable download plugin prompt user_pref("plugin.display_plugin_downloader_dialog", false);
# 43. Advanced Mail/News display tweaks
This tip requires (basic) knowledge of CSS. All settings are done by
manipulating userContent.css. The main document describing the commands
can be found here. I will only give some examples now, to show the power
of Mozilla... :-)

# These makes the font in the mail/news window bigger (usercontent.css):
in this example 12 points.

.moz-text-plain pre {
font-size: 12pt;
}

# Use another font for mail/news display:
.moz-text-plain pre {
font-family: Arial ! important;
}
###3 netscspe
user_pref("mailnews.start_page.enabled", false);
user_pref("browser.wfe.ignore_def_check", true);
user_pref("mailnews.start_page.url", "about:blank");
Thunderbird on Linux
http://gentoo-wiki.com/TIP_Integrate_Thunderbird_and_Firefox
user_pref("network.protocol-handler.app.ftp","/usr/bin/firefox");
user_pref("network.protocol-handler.app.http","/usr/bin/firefox");
user_pref("network.protocol-handler.app.https","/usr/bin/firefox");