# AstoundTube

> AstoundTube is a free, privacy-first browser extension that provides precise playback speed control (0.1x to 4x) for YouTube videos. Available for Firefox, with Chrome support coming soon.

AstoundTube gives users granular control over YouTube video playback speed with keyboard shortcuts, speed memory across videos, and zero data collection. The extension is lightweight (~40KB) and never contacts external servers.

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## Features

### Speed Control
- **Range**: 0.1x to 4x playback speed
- **Increments**: 0.1x precision for fine-tuned control
- **Default**: 1x (normal speed)

### Keyboard Shortcuts
| Shortcut | Action |
|----------|--------|
| Shift + > | Increase speed by 0.25x |
| Shift + < | Decrease speed by 0.25x |
| Shift + Space | Reset to 1x |

### Speed Memory
- Remembers your preferred speed for each video
- Settings persist across browser sessions
- Per-video speed preferences stored locally

### Visual Feedback
- Minimal on-screen overlay displays current speed
- Appears briefly when speed changes
- Non-intrusive design that doesn't block video content

### Thumbnail Controls
- Hover over video thumbnails to set speed before watching
- Quick access to speed presets (0.5x, 1x, 1.5x, 2x)
- Preview speed without opening the video

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## Technical Specifications

### Extension Details
- **Size**: ~40KB (minimal footprint)
- **Manifest Version**: 3
- **Minimum Browser Version**: Firefox 109+

### Required Permissions
- `tabs`: To detect YouTube pages
- `*://www.youtube.com/*`: To inject speed controls

### Data Storage
- Uses browser's local storage API
- Stores: speed preferences, UI settings
- No cloud sync or external storage
- All data stays on user's device

### Privacy Architecture
- Zero analytics or telemetry
- No tracking pixels or cookies
- No external API calls
- No user data collection
- No third-party scripts
- Compliant with GDPR, CCPA, and similar regulations

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## Installation

### Firefox
1. Visit [Firefox Add-ons](https://addons.mozilla.org/firefox/addon/astoundtube/)
2. Click "Add to Firefox"
3. Grant requested permissions
4. Extension icon appears in toolbar

### Chrome (Coming Soon)
Chrome Web Store listing is pending review.

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## Usage Guide

### Basic Usage
1. Navigate to any YouTube video
2. Use keyboard shortcuts to adjust speed
3. Speed overlay shows current setting

### Advanced Usage
- **Per-video memory**: Each video remembers its last speed
- **Global default**: Set a default speed for all new videos
- **Quick reset**: Shift+Space returns to normal speed instantly

### Popup Interface
Click the extension icon to access:
- Speed slider control
- Preset speed buttons
- Settings toggle
- About information

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## Privacy Policy Summary

AstoundTube is designed with privacy as a core principle:

1. **No Data Collection**: We do not collect any personal data
2. **Local Storage Only**: All preferences stored on your device
3. **No External Connections**: Extension never contacts external servers
4. **No Tracking**: No analytics, pixels, or tracking mechanisms
5. **No Third Parties**: Data is never shared with anyone
6. **Open Source**: Code is publicly auditable on GitHub

Full privacy policy: https://tools.astound.technology/extension/astoundtube/privacy.html

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## Frequently Asked Questions

**Q: Is AstoundTube completely free?**
A: Yes. No premium features, subscriptions, or in-app purchases.

**Q: Does it work on YouTube Music?**
A: Currently optimized for youtube.com video pages only.

**Q: Can I set a default speed for all videos?**
A: Yes, through the extension popup settings.

**Q: Will it affect browser performance?**
A: No. The ~40KB extension only runs on YouTube pages.

**Q: Is my viewing history tracked?**
A: No. We don't track or store any viewing data.

**Q: How do I report bugs?**
A: Open an issue on GitHub or email contact@astound.technology

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## Links

- Homepage: https://tools.astound.technology/extension/astoundtube/
- Privacy Policy: https://tools.astound.technology/extension/astoundtube/privacy.html
- Firefox Add-on: https://addons.mozilla.org/firefox/addon/astoundtube/
- GitHub: https://github.com/AstoundTechnology/astoundtube
- Company: https://astound.technology
- Support: contact@astound.technology
- Twitter/X: https://x.com/Astound_tech

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## Version Information

- Current Version: 1.0.0
- Last Updated: January 2026
- License: MIT