Update text in README file

README.md

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 # SecureBit Chat Browser Extension
-Browser extension for SecureBit Chat (P2P encrypted chat)
+
+Browser extension for SecureBit Chat — P2P messenger with military-grade cryptography.
+
+## Features
+
+- 🔐 **Military-grade cryptography**: ECDH + DTLS + SAS
+- 🌐 **P2P communication**: Direct connection without servers
+- 📱 **QR codes**: Quick connection via QR scanning
+- ⚡ **High performance**: Optimized for speed
+- 🎯 **Non-intrusive**: Widget appears only on demand
+
+## Installation
+
+1. Download or clone this repository
+2. Open Microsoft Edge browser
+3. Navigate to `edge://extensions/`
+4. Enable "Developer mode" toggle
+5. Click "Load unpacked" button
+6. Select the `extension-build` folder
+
+## Usage
+
+### Main Interface
+
+- Click the extension icon in the toolbar
+- Use all chat features as in the web version
+
+### Widget on Web Pages
+
+The widget does **NOT** appear automatically on all pages.
+
+**Ways to activate the widget:**
+
+1. **Keyboard shortcut**: `Ctrl + Shift + S` on any web page
+2. **From popup**: "Show widget" button (if added)
+
+**Widget controls:**
+
+- `Ctrl + Shift + S` - show/hide widget
+- "−" button - minimize widget
+- "×" button - close widget
+
+## Building
+
+To build the extension, use the PowerShell script:
+
+```powershell
+powershell -ExecutionPolicy Bypass -File build-extension.ps1
+Project Structure
+bash
+Copy code
+├── extension-build/          # Built extension
+├── extension-manifest.json   # Extension manifest
+├── extension-background.js   # Background script
+├── extension-content.js      # Content script
+├── extension-popup.html      # Popup HTML
+├── extension-popup.js        # Popup script
+├── build-extension.ps1       # Build script
+└── README.md                 # This file
+Security Features
+ECDH Key Exchange: Elliptic Curve Diffie-Hellman for secure key generation
+
+DTLS Encryption: Datagram Transport Layer Security for data protection
+
+SAS Verification: Short Authentication String for identity verification
+
+P2P Architecture: No central servers, direct peer-to-peer communication
+
+Military-grade: Enterprise-level security standards
+
+Version
+Current version: 1.2.14
+
+License
+MIT License
+
+Support
+For questions or issues, create an issue in the repository.
+
+Documentation
+Installation Guide - Detailed installation instructions