really cool but not mature Rated 4 out of 5 stars

This tool helps a lot on navigating through mail threads and is really cool and intuitive to use.
BUT: There is always a warning from thunderbird (command not successful, mailbox does not exist).
I'm using the 3-row-view in thunderbird so there is not much space left for the messageheader. Therefor I would like the tool just to consume the space it needs for the graph and not to take the full width always.

This review is for a previous version of the add-on (0.9.462).