Rated 1 out of 5 stars

1.) There is no user guide, or: where is it?

2.) I created a button "Send Later" (CTRL & SHIFT & ENTER) for the message composition window. Did not work with Thunderbird 24.3.0.

3.) The key combination CTRL & SHIFT & ENTER still works ok.

4.) https://www.mozdev.org/projects/overview/custombuttons/ ends with "latest" version 0.0.5.5 (instead of 0.0.5.7) which seems to be dated 28.06.11(see, e.g., http://custombuttons.mozdev.org/) ??!!.

This review is for a previous version of the add-on (0.0.5.7.1-signed).