Link Shortener is a subscription-based Firefox extension designed for social networking and communication. This tool allows users to easily shorten any URL, enhancing the sharing experience across various platforms. Key features include the ability to set link expiration by date or clicks using T.LY, and the option to integrate personal API keys from Bitly and T.LY. Users can also utilize their own custom domain names through the Rebrandly API, ensuring a personalized touch to shared links.

In addition to its core functionality, Link Shortener offers convenient features such as automatic copying of shortened URLs to the clipboard and a simple right-click option for quick URL shortening. It supports multiple link shortener services, including TinyUrl and isgd, making it versatile for different user preferences. The extension also generates shareable QR codes, further expanding the ways users can share their links.