Design a Firefox add-on that has a customizable screenshot tool allowing users to select specific elements on a webpage, including images, text, and video. The add-on should include annotation and editing features, such as the ability to crop and resize images, add arrow and text annotations, and share the screenshot via social media platforms or email. The add-on should also support keyboard shortcuts for quick and easy access. Additionally, the add-on should be able to store screenshots in a gallery or library for future reference.
This prompt doesn't seem malicious.