Table of Contents
TBC
The Config Editor is accessed via Preferences→Preferences→Advanced→General→Config Editor.
Thunderbird defaults to using the desktop's default web browser. To override this setting, use the config editor (below) to ensure network.protocol-handler.app.http and https exist with the path to the desired browser program. For example, for firefox ( this did not work on Ubuntu 12.04 Precise):
network.protocol-handler.app.http, string, /usr/bin/firefox
network.protocol-handler.app.https,
string,
/usr/bin/firefox
There's a Mozilla KB page on configuring Thunderbird as a Gmail client, listed in the Reference section below.
Server Settings -> Advanced -> Show Only Subscribed Folders
In Config Editor (above):
Account Settings→Server Settings→Advanced→Show Only Subscribed Folders
Depending on the setting of "Show Only Subscribed Folders", folders on the server that Thunderbird is not subscribed to are invisible or shown greyed out.
To subscribe to folders, right click any folder and choose Subscribe. Expand the list until the folders you want to subscribe are visible, toggle (\?) the checkbox and click Subscribe.