Thanks for the feedback :)

Regarding security concerns, the code can and should be reviewed in https://github.com/averissimo/shorten-me *(or in the actual compressed file that is downloaded from firefox add-ons)*... I understand that it could be difficult for non-coders to do it.

The addon only has one call to an external service in this block: https://github.com/averissimo/shorten-me/blob/master/src/core.js#L92-L104

That then is copied to clipboard by running some javascript code in the current tab with really complicated code, but -- as of the time of writing -- it was the only way to do it *(even in examples from firefox)*

https://github.com/averissimo/shorten-me/blob/master/src/core.js#L20-L80