[3.6.6] - 2026-11-03

• HLS External Audio Track Muxing: Automatic resolution and downloading of external audio groups (EXT-X-MEDIA:TYPE=AUDIO) and multi-source remuxing for TS (remuxTsToMp4 with audioSource) and fMP4 (muxFragmentedMp4Files).
• HLS Separate-Audio Child Playlist Filtering: Filtered standalone child playlists from discovery when a parent master with separate audio is detected.
• Brightcove & CMAF Partial Media Filtering: Suppressed .m4f, .cmfv, and .cmfa partial fragments.
  DASH startNumber="0" Fix: Handled zero-indexed segment templates accurately in DASH manifests.

Durable Pause & Resume for YouTube HD Paired Streams: OPFS sidecar checkpoints for completed 8 MB chunks, track verification safeguards, smooth byte-based phase percentage, and safe writable closing on abort/pause.
Finished Task Retention Capping: Bounded active in-memory task map to the 100 newest finished tasks to prevent memory and storage bloat during long sessions.
DASH Download Resiliency & Monotonic Progress: Byte-based total calculations and reliable stream writable commits.
Code Hygiene: Removed obsolete runtime message actions (startYouTubeDownload, reorderQueue) and deprecated queue reordering upsell copy.
Test Suite Enhancements: Added tests for checkpoint resume/truncation and history retention limits.

• Faster Stream Discovery & Onboarding:
- Added 1-click "Scan page again" and "Paste stream URL" buttons directly on the empty discovery view.
- Simplified guidance with site-specific quick tips (YouTube, Facebook, Twitter/X, Vimeo, Bilibili).
- Search and filter pills automatically adjust to keep the interface clean and clutter-free.

• Smarter Size & Format Accuracy:
- Accurate HLS Stream Sizes: Probes media playlist duration from #EXTINF tags to calculate realistic stream file size estimates (~MB) before downloading.
- Reliable Audio Stream Sniffing: Audio formats (including .m4a and AAC) are accurately detected as Audio instead of being misidentified as MP4 video.
- MP3 Export Estimation: Accurate projected MP3 output sizes calculated from track duration at 192 kbps.
- Original Container Option: Added quick dropdown action to save HLS streams in their original MPEG-TS container when remuxing is not needed.

• Polished Navigation & Settings:
- Added clean SVG icons to bottom navigation tabs (Downloads, History, Settings).
- Replaced the settings-jump upsell with an unobtrusive in-place notification strip under the header with instant "Get Pro" and "Not now" actions.
- Added responsive layout wrapping for site profile inputs to prevent text clipping.
- Added visual locked indicators and friendly toast explanations for Pro presets.

• Download Pipeline Hardening:
- Resilient HLS Encryption Keys: Failed encryption key fetches are removed from cache so network hiccups don't break subsequent segments.
- Tab Isolation: Capture events are strictly validated to accept data only from the active capture tab.
- Clean Filenames: Enhanced sanitization for non-printable control characters.
- Full Localization: All new strings translated across 7 languages (EN, ES, FR, DE, JA, PT, AR).

Default HLS Stream Output to MP4: HLS streams now convert to MP4 by default with automatic in-browser remuxing from MPEG-TS, providing immediate playback in QuickTime and standard media players with smooth timeline continuity across stream discontinuities (falling back cleanly to .ts if remuxing fails or when explicitly requested).

Updated Support email.
Updated the product webpage.
Updated the product Pro Pricing accurately.

Faster & Smoother MP3 Conversion:
2× Faster Audio Encoding: Optimized the MP3 conversion process to roughly double encoding speed while preserving full 192 kbps audio quality.
Dedicated Background Worker: Offloaded audio processing to a separate background worker thread, ensuring conversions run smoothly without slowing down active downloads or extension responsiveness (with automatic in-thread fallback).

VidNeat v3.6.0 & v3.5.0 Update:

• Streaming MP3 Conversion: Convert long audio files (podcasts, live sets, 90+ min tracks)
• A/V Sync Fix: Fixed frame timing on HLS TS-to-MP4 streams so 24/25/50/60 fps video stays perfectly in sync with audio.
• OPFS Streamed Remuxing: Large TS-to-MP4 streams remux through temporary disk cache instead of consuming browser memory.
• Audio Honesty: MP3 downloads now download audio-only tracks, pass through existing MP3s without re-encoding, and retain true extensions.
• Pro Settings & Support: Direct Support email trigger (support@handancorp.com) and updated official Privacy Policy link.
• Full localization across all 7 supported languages.

What's New in VidNeatDown v3.4.9
Smarter YouTube Stream Discovery: When high-definition stream variants take a moment to be exposed during playback, VidNeatDown now performs bounded background refreshes automatically while keeping available qualities ready to download immediately.
Clearer Live Status: Updated scanning feedback clearly indicates when additional stream resolutions are being checked in the background.
Enhanced Scanning Reliability: Rescanning or switching video tabs promptly resets stream detection states for faster, more accurate results.
Full Highlights (v3.4.8 – v3.4.9)
Smoother & More Resilient Downloads: Optimized multi-lane connection ramping and throughput estimation for large media streams, preventing stalls and sudden speed dips.
Robust Pause & Resume: Reinforced background safety fallbacks ensure pause and resume transitions respond reliably across all media types.
Refined Popup Interface: Cleaner detection cards, improved action controls, and an updated layout designed specifically for Firefox.

What's New in VidNeatDown 3.4.6:

• YouTube Video & Audio Downloads: Seamlessly resolve adaptive streams, download high-definition video formats, and extract audio tracks directly in Firefox (subject to Terms of Service).
• Adaptive Multi-Connection Ramp: Intelligent connection slow-start ramps downloads smoothly and avoids network saturation, with automatic throughput stabilization across DASH and multi-lane downloads.
• Universal Speed Engine: Replaced spike-prone instant measurements with a smoothed 3-second EWMA throughput sampler. Real-time download speeds and stalled-stream indicators are now significantly more accurate.
• Offscreen Pause & Resume Guard: Extended safety watchdogs to offscreen downloads, preventing wedged pause buttons if worker acknowledgements drop and ensuring accurate restart states.
• YouTube Video + Audio Remuxing: High-definition adaptive video and audio tracks are paired and remuxed on-the-fly locally into playable MP4 files with zero quality loss.
• UI & Queue Polish: Added single-card dismissal for completed downloads, improved rescan reliability, and optimized tab switching behavior during active downloads.

What's New in VidNeatDown v3.4.1 for Firefox:

• Video Preview & UI Stability: Implemented smart DOM reconciliation in the popup so detected video cards and active preview players never flicker, restart, or reload when new streams or variants are discovered on the page.
• Fast Quality & MP3 Selection: 1-click pills to choose resolutions or locally convert audio directly to MP3 using client-side Web Audio transcoding.
• Pause & Resume Integrity: Full persistence for multipart and single-connection downloads across pauses or network drops.
• Ad-Free Stream Filtering: Intelligent filtering of video ads (prerolls, midrolls, outstream, VAST/VMAP).
• AMO Rating Link: Updated the 3-download milestone review prompt to point directly to the Firefox Add-ons store listing.
• Firefox MV3 Hardening: Native sidebar support, clean background messaging, and zero-telemetry offline processing.