Librezam de FoxRefire

This extension is a browser extension that recognizes music currently playing in the current tab using Shazam's internal API and multiple alternative backends.
No telemetry or other communications unrelated to music recognition are performed.
To learn about the characteristics of each backend and how user data is processed, please see the Privacy Policy section.
This is an unofficial project and has not received any assistance from Apple Inc. or the providers of alternative backends.

Source code
https://github.com/FoxRefire/Librezam

==Comparison with Similar Extensions==

• Song Identifier
  Only supports ACRCloud backend (no humming response support)
  No history, auto-recognition mode, auto-retry, or microphone recognition features
  No support for CORS, Headless Element, or ShadowRoot detection
  Open source (Unlicense)
  API key registration required (100 requests per day free)
  No telemetry unrelated to music recognition
• Audd
  Only supports Audd backend
  No auto-recognition mode, auto-retry, or microphone recognition features
  Source-available proprietary
  CORS, Headless Element, and ShadowRoot detection support from version 3.2.4 onwards (I provided advice on fixing these issues in the Audd extension)
  AudioBufferSourceNode and site-specific issues are not fixed
  Some sites like Twitch display messages asking to purchase API keys
  Sends telemetry including tab URLs, not just audio data
• Librezam
  History feature
  CSV export of history
  Multiple backend support (Shazam, Audd, ACRCloud, Tencent, NetEase)
  Shazam backend available without registration or rate limits (ACRCloud backend requires API key setup)
  Humming and cover song recognition (ACRCloud, Tencent backends)
  Automatic retry with different backends or longer recording times when recognition fails
  Auto-recognition mode
  Microphone recognition mode
  CORS, Headless Element, and ShadowRoot detection support
  Site-specific fixes for TikTok and RadioGarden
  AudioBufferSourceNode detection support (experimental and still unstable, disabled by default)
  Can recognize even when a different tab is open from the one playing audio
  Shortcut keys to start recognition (Ctrl+E for tab audio recognition, Ctrl+Alt+E for microphone recognition)
  Customizable streaming providers to display in results
  Open source (AGPL-3.0)
  Cross-browser support (works on Android Firefox and Chromium)
  No telemetry unrelated to music recognition

===Troubleshooting===

• Media elements not detected on some sites, site-specific issues occur
  Some sites may not start recording correctly due to DRM restrictions or site-specific issues.
  DRM restrictions cannot be fixed, but if site-specific issues occur, please report the problem and details via GitHub Issues.
  Pull requests to fix issues are also welcome.
  Please do not report bugs in the review section.
  https://github.com/FoxRefire/Librezam/issues/7
• Media elements not detected on all sites
  This may be because the extension's site permissions have been revoked.
  This rarely happens when updating add-ons.
  Open the add-on settings permissions tab and allow the "Access to saved data for all websites" permission.
• Songs are not recognized
  This extension's music recognition processing depends on each backend, and only the Shazam backend is used by default.
  If songs are not recognized correctly, try adding different recognition backends or adjusting recording time from the extension settings.
  Also, while Google's music recognition feature is not yet integrated as a backend in Librezam, it has very high accuracy, so it's worth trying