Live Recorder is a subscription-based Firefox add-on designed for capturing audio, video, and canvas elements in real-time. It allows users to record media from various websites, such as YouTube, by simply clicking a button once the desired content is displayed. The recordings are saved in the webm format, ensuring high-quality output. However, some websites may not support this functionality due to different media serving methods, which could lead to the absence of the status bar during recording sessions.

The add-on operates at a maximum frame rate of 60 FPS, but users can manipulate the recordings using external tools like ffmpeg to adjust codecs and frame rates if needed. While it is a straightforward tool for capturing multimedia content, users should be aware of potential Firefox bugs that might affect metadata. Overall, Live Recorder provides a practical solution for users looking to record web-based audio and video efficiently.