Simple Audio Capturer

This is a simple audio recording extension for Google Chrome. It captures the audio stream from the currently active browser tab and automatically saves the recording as a `.wav` file. The extension is built using Chrome’s `tabCapture` API and the `MediaRecorder` API. Users can start and stop recording with a single click through an intuitive popup interface. No advanced settings or configurations are required. Once recording is stopped, the audio file is immediately downloaded to the user's device as `recorded_audio.wav`. This extension is suitable for both developers interested in Chrome extension development and general users who want to record audio from websites such as YouTube, video calls, or webinars. It offers a minimal, efficient way to capture tab-specific audio in high-quality format. Let me know if you'd like a Korean version or a shorter version for the Chrome Web Store listing headline.