Netflix Optimizer — 4K/1080p + 5.1

A Chrome/Edge extension to unlock the best possible Netflix playback quality on your browser and platform.

Features

• 4K HDR on Windows + Edge
• 1080p on Mac/Chrome, Linux/Chrome, Windows/Chrome
• 5.1 audio on all supported platforms
• Auto-selects the highest available bitrate at playback start
• Platform capability detection with status popup
• Configurable options (VP9, AV1, AVChigh, subtitle tracks)

Installation

1. Download the latest zip from Releases
2. Unzip to a folder
3. Open Chrome → chrome://extensions → Enable Developer mode
4. Click Load unpacked → select the src folder

Platform Support

Platform	Max Resolution	Audio
Windows + Edge	4K HDR	5.1
Windows + Chrome	1080p	5.1
Mac + Chrome	1080p	5.1
Mac + Edge	1080p	5.1
Linux + Chrome	1080p	5.1

Options

Right-click the extension icon → Options to configure:

• ✅ Use 5.1 audio when available
• ✅ Automatically select best bitrate
• ☐ Disable VP9 codec
• ☐ Disable AVChigh codec
• ☐ Disable AV1 codec
• ☐ Show all subtitle tracks

Keyboard Shortcuts (on Netflix watch page)

Shortcut	Action
Ctrl+Shift+Alt+D	Debug Info
Ctrl+Shift+Alt+B	Bitrate Override Menu

Packaging

Run ./scripts/package.sh to create a clean release zip from the src folder.

How It Works

1. Player core redirect — uses declarativeNetRequest to redirect Netflix's cadmium-playercore script to a patched version that unlocks higher quality profiles
2. Bitrate forcing — injects a script that simulates the hidden Ctrl+Alt+Shift+B menu interaction to select the maximum bitrate automatically
3. Platform detection — detects browser/OS combination to report actual achievable quality