What is the easiest way to develop Firefox extension?

Question

I\'m planning to develop a simple Firefox extension that will shorten URL of a currently active tab, display a popup with the shortened URL, and place it into the clipboard.

Answer 1

There are two official ways for developing add-ons, each of them has pros and cons:

1- WebExtensions (newer method):

WebExtensions are the future of Firefox add-ons. If you can use the WebExtensions API, it's the best choice. You can develop and publish WebExtensions right now, but they're still in an early state.

2- Add-on SDK (older method):

The Add-on SDK provides APIs for developing Firefox add-ons, and a tool for developing, testing, and packaging them.