Review for Open by Message-ID by Randy
Rated 5 out of 5 stars
This adds much needed functionality to Thunderbird. You have to use the context options from the message body for it to work. Once you understand that, it works as expected. Glad to see the app. I wish Thunderbird would make this native, so that you can just click on any message-ID in the headers, and have it automatically download from the server.
To create your own collections, you must have a Mozilla Add-ons account.