Rated 1 out of 5 stars
Although version 0.2.4 appears to work on Thunderbird 3 there is a fatal flaw. If you choose not to automatically resize, you get the question when sending, say no but it still resizes. Even after disabling this addon it still resizes.
I have had to uninstall it and go back to ShrinkPic, which works perfectly, until this addon can be fixed.