I was tired loosing time using the mouse to switch between “to:” and “cc:” when adding mail adresses to the mail I was writing.
Using this addon is no more needed, just use the ALT+CTRL+C keyboard shortcut!

Now let’s go with the warnings!

• USE IT AT YOUR OWN RISK!
• DO A BACKUP BEFORE USING IT FOR THE FIRST TIME (backing up your data periodically is always a good practice)
• I’ve not tested it in every enviroment, so it could do not work for you. In this case feel free to debug it and submit a bug report.

How does it work?
When you’re writing an address in the composer window, just press ALT+CTRL+C to toggle between “cc:” and “to:”, without using your mouse!

Download
If you are still confident, download it from the Mozilla add-on site.
This addon is also opensource: get its code from github.

Bugs
To send a bug report use github.

Future improvements?
Check the issue tracker.


Image courtesy of “webdesignerdepot“.