This is just a helper for adding a time tag. In any text field select your shortcut and press F2. The selection will be extended by the time tag.
If you think this add-on violates Mozilla's add-on policies or has security or privacy issues, please report these issues to Mozilla using this form.
Please don't use this form to report bugs or request add-on features; this report will be sent to Mozilla and not to the add-on developer.