Focus Music

Extension Purpose

This Chrome extension is a focus music player that provides lo-fi, classical, jazz, ambient, and binaural beats for continuous play with smooth transitions. It manages installation events, opens a welcome page, and handles audio playback via an offscreen document.

Key Behaviors and API Usage

• Installation Handling

  • On first install, opens a welcome page (https://albinaparker.com/focus-music/welcome/).
  • Sets an uninstall URL (https://albinaparker.com/focus-music/uninstall/) to be opened when the extension is removed.
  • Generates a unique installation ID and stores it locally along with the install date.

• Offscreen Audio Playback

  • Uses Chrome's offscreen API to create an offscreen document (offscreen.html) for audio playback with crossfade transitions.
  • All messages received by the background script are forwarded to the offscreen document for processing.

• Storage

  • Uses chrome.storage.local to store flags and installation metadata.

• No File System, Shell, or Privilege Operations

  • No use of filesystem APIs, shell commands, PowerShell, privilege escalation, persistence outside of normal extension mechanisms, registry access, file/user creation, or clipboard access.

• Network Activity

  • The only external network activity is opening the welcome and uninstall URLs in a new tab. No background network requests or data exfiltration are present in this code.

Potentially Sensitive Code Snippets

chrome.runtime.setUninstallURL(UNINSTALL_URL);
chrome.tabs.create({ url: WELCOME_URL });

These lines open external URLs on install/uninstall, which is a common and generally benign pattern for onboarding and feedback.

Obfuscation

• The code is not obfuscated. Variable and function names are clear and descriptive.

Summary

• The extension's code is straightforward, focused on user onboarding and audio playback. No indicators of malicious behavior or suspicious API usage were found.