Last Used Tab Switcher - Chrome Extension

A Chrome extension that allows you to quickly switch between your current tab and the last used tab, plus duplicate the current tab, similar to Firefox's behavior.

Features

• Tab Switching: Quickly switch between current and last used tab
• Tab Duplication: Duplicate the current tab with a keyboard shortcut
• Keyboard Shortcuts:
  • Alt+Tab (Mac) / Ctrl+Q (Windows/Linux) to switch to last used tab
  • Alt+Shift+D (Mac) / Ctrl+Shift+D (Windows/Linux) to duplicate current tab
• Popup Interface: Click the extension icon to access both features manually
• Automatic Tracking: Automatically tracks your tab usage in the background

Installation

1. Open Chrome and navigate to chrome://extensions/
2. Enable "Developer mode" in the top right corner
3. Click "Load unpacked" and select this folder
4. The extension will be installed and ready to use

Usage

Keyboard Shortcuts

Switch to Last Used Tab:

• Alt+Tab on Mac
• Ctrl+Q on Windows/Linux

Duplicate Current Tab:

• Alt+Shift+D on Mac
• Ctrl+Shift+D on Windows/Linux

All shortcuts can be customized in Chrome's extension settings at chrome://extensions/shortcuts

Popup Interface

• Click the extension icon in the toolbar
• View current and last used tab information
• Click "Switch to Last Used Tab" button to switch tabs
• Click "Duplicate Current Tab" button to duplicate the current tab

How It Works

The extension tracks tab activation events and maintains a record of:

• Current active tab
• Last used tab (the tab you were on before the current one)

Tab Switching: When you use the switch shortcut or button, it activates the last used tab, making tab switching quick and efficient.

Tab Duplication: When you use the duplicate shortcut or button, it creates a new tab with the same URL as the current tab and places it immediately after the current tab.

Files Structure

• manifest.json - Extension configuration
• background.js - Service worker that tracks tab usage
• popup.html - Extension popup interface
• popup.js - Popup functionality
• icon*.png - Extension icons (16x16, 48x48, 128x128 PNG files)
• requirements.txt - Python dependencies for icon generation
• LICENSE - MIT License
• create_simple_icons.py - Script to generate icons

Customization

You can customize the keyboard shortcut by:

1. Going to chrome://extensions/shortcuts
2. Finding "Last Used Tab Switcher"
3. Setting your preferred key combination

Notes

• The extension requires "tabs" permission to track and switch between tabs
• Tab tracking starts when the extension is installed/enabled
• If the last used tab is closed, the extension will handle this gracefully