a7p’s

Message-ID-Finder is a truly nice Add-on for Thunderbird. It embeds clickable message-ids into the mail-header. So if there are any references in the header, you are quickly able to find them, where ever you dropped them.
Sadly Message-ID-Finder does not seem to be under active development, so the you have to adjust the installation-requirements in install.rdf in order to enjoy this wonderful extension. Even though this is ugly in some way - this extension rocks!

Once upon a time, the Mozilla webbrowser allowed specifying the searchengine using a shortcut, you just typed your query into the location-bar, pressed “down” and Mozilla suggested asking Google about it.
The SearchWords extension brings something way better to Firefox: The SearchWords Add-on allows you to specify your search-engine using the Konquerer style (which is one of the few things I always liked about Konquerer. Just specify some shortcuts for certain search-modules you have available via the search-box and enjoy searching for “g apache doc”, “i Wes Anderson”, “cc chinese wall”.

If your ssl-certificates domain should differ from the actual domain you are using to establish the secure connection to your mailserver, install this extension, check the domainmissmatch carefully ONCE and never again think about arguing with your Systemadministrator (because of this particular problem).

If Thunderbird still complains about your certificates, try installing the Cert Viewer Plus, to save your certificate and import it as a trusted authority afterwards - I’m feeling lucking now.