ProtonMail Sidebar Resizer

Features

• Adds resizable width functionality to ProtonMail sidebar
• Supports drag-and-drop sidebar width adjustment
• Automatically saves user width settings
• Works with proton.me and protonmail.com domains

Installation

1. Download the code from this repository
2. Open Chrome browser and go to extensions page (chrome://extensions/)
3. Enable "Developer mode" in the top right
4. Click "Load unpacked extension"
5. Select the downloaded code folder

Usage

1. After installation, visit ProtonMail webmail
2. A draggable area will appear on the right edge of the sidebar
3. Click and drag this area to adjust the sidebar width
4. Settings are automatically saved and will persist on next visit

Compatibility

• Supports new ProtonMail interface
• Works with Chrome/Edge and other Chromium-based browsers
• Supports Manifest V3

Privacy Information

• This extension does not collect any user data
• Only uses browser local storage to save width settings
• Requires no network permissions