Rated 3 out of 5 stars

This is a hugely useful addon that I use extensively, but it has some annoying problems.

On my laptop (resolution 1366 x 768) both the header edit and full edit windows constantly appear larger than the size of the screen, so the entire title bar and the OK and Cancel buttons are not visible or reachable, You then have to manually drag window borders to shrink it down and get the buttons within reach. However, the next time you launch either edit window, it's back to the same huge size again, so you have to go through this window sizing exercise every single time. The window should never be bigger than the desktop that it's being displayed on, and it should also retain its last used size and position.

The second annoyance (don't know if this can even be fixed) is that making simple adjustments to emails (e.g. email subject changes) changes a date somewhere that affects display order so that the edited email jumps to the top of the list rather than staying in its original position. It's weird because the sent or received date remains unchanged, but various email clients end up displaying the emails in incorrect date order once edited. Also the recipient name gets changed when viewed in web mail clients. Instead of showing the name and email of the person the email was sent to, it shows your own email name and address (as if you had sent it to yourself). This is despite the fact that no edits have been made to either sender or recipient. It does not seem to affect Thunderbird, but when accessing the same email account in a web browser, I have a bunch of emails in my sent folder where the recipient name is me.

This review is for a previous version of the add-on (0.5.2).