MiniWebView Sidebar 0.1
Sidebar that shows a single web page. This allows Thunderbird to be augmented with any user-supplied or third-party web page. The screenshot shows an example - I use my own custom web page to present my Google Calendar in my preferred format.
This add-on has been preliminarily reviewed by Mozilla. Learn more
This add-on is not compatible with your version of Thunderbird because of the following: