Review lyrics on desktop YouTube

Release snapshot

The publisher’s current README reports Chrome 0.9.4 and Edge 0.9.3 as published on 3 October. Both include floating lyrics, timing repair and practice controls. Version 0.9.4 changes the name and store description; functionality and data handling match 0.9.3.

Record the version you install. Release facts below come from the public sources linked at the end. The archived screenshots have individual provenance labels.

A practical review workflow

Try these checks

These are suggested checks and expected results. Fill in review-notes.csv with your own observations. No results have been prefilled.

1. Start clean

   Install from your browser’s official store. Record the version, refresh a desktop YouTube watch page and open the Lyrics controls.

   Check: The controls appear after refresh. Existing Off settings may require turning lyrics on.

2. Check a provider match

   Choose a song you know. Compare the selected artist, recording and duration. Try a second recording if offered.

   Check: Report whether a match was found and whether it is the same performance. Keep no-match cases in the review.

3. Use the supplied timing sample

   On a test video longer than 35 seconds, open Settings → Import or time lyrics. Import or paste tests/reviewer-timing-sample.lrc and choose Use LRC. Reset Delay to 0.

   Check: The original sample lines follow the video clock at 5, 10, 15, 20, 25 and 30 seconds. This tests local import/display; it does not test song recognition.

4. Adjust delay

   With the sample selected, enter a +2.00 second delay, then replay from the start. Reset the delay after checking.

   Check: The first sample line should begin near 7 seconds instead of 5. Record observed timing, including any discrepancy.

5. Try the floating view

   Click Float or Float lyrics. Switch between Compact and Scrolling, then use another application while keeping the source tab open.

   Check: Lyrics remain visible in a supported browser. Playback controls act on the existing YouTube player. Record if the browser lacks the required API.

6. Practise and clean up

   Set A near 10 seconds and B near 20 seconds in the practice controls; start then clear the loop. Use Forget this video to remove the test import.

   Check: The selected section repeats while the loop is active. Clearing it restores normal playback. Record your result; no test result is prefilled.

Open the current setup and troubleshooting guide

Limits to include in coverage

• No guarantee of lyrics, a correct recording match or perfect timing for every song. Covers, live performances, intros and edited videos can require manual work.
• Floating lyrics require Document Picture-in-Picture support. The source YouTube tab must remain open. This is a desktop browser extension.
• Untimed lyrics remain readable; they do not acquire verified timing merely because they are displayed.
• Verse loops are temporary. Off, navigation, ads or changed timing can clear them. Source translations and word timing depend on available provider data.

If something does not work

No lyrics: Check Lyrics On, enabled sources and the selected recording. Try a different recording or a local LRC import. A provider may have no suitable match.

Lyrics drift: Use the matching recording where possible. A constant delay fixes a consistent offset; line timing repair may be needed for edited or live recordings.

Floating window unavailable: Use an updated desktop Chrome/Edge build with Document Picture-in-Picture support and keep the source watch tab open.

Saved-screenshot walkthroughs

Historical screenshots assembled into silent videos on 1 October 2026. Captions identify the medium. These show saved interface states; they do not demonstrate continuous playback or fresh live interaction.

Landscape · 1920 × 1080   Portrait · 1080 × 1920

18 seconds each · H.264 · 30 fps · no audio. Text is visible in the video. For a readable description, use the text guide.

Privacy and permissions

• Enabled lyric providers receive song searches and ordinary connection information, including IP address. Requests go directly to those providers; their retention is governed by their own policies.
• Preferences and up to 40 selected-video entries are saved in local extension storage, not browser sync. Saved entries can include video IDs, lyrics and timing edits.
• Automatic caption timing reads the current video’s available caption tracks. Eligible live/acoustic audio matching runs locally with bundled model weights; audio and raw captions are not uploaded by the extension.
• No publisher analytics, advertising, account system or publisher lyric server. Local audio matching and automatic timing can be disabled independently.

Read the complete current privacy policy

Source license

Proprietary. The public GitHub repository contains policy and support information; it does not publish the extension runtime source.

Evidence and support

Product documentation checked 3 October 2026. The Git blob identifiers record the versions read while preparing this kit.

• Current release and usageGit blob c8a63339488d8880bc686966884ea2d8c704d1a4
• Privacy policyGit blob a860b9624b4fe1f911b3d3ebef683dbfa17f0e56

Asset provenance and hashes · What this kit adds · File inventory

Contact support@perfsn.xyz or the public Issues page with extension/browser versions, the relevant page and reproducible steps.