Build a Chrome Extension

Help me build a Chrome extension for the following:

Extension name: [name]
What it does: [describe the functionality and problem it solves]
Key features: [list the main things it does]
Extension type: [popup / content script / background service / devtools / side panel / combination]
Permissions needed: [tabs / storage / activeTab / scripting / cookies / other]
UI required: [popup window / options page / content overlay / context menu]
Data storage: [chrome.storage.local / chrome.storage.sync / none]
External API integration: [yes / no]
Target: [Manifest V3 - current standard]

Build the complete extension:

MANIFEST:
- Complete manifest.json with all required fields
- Permission explanations and minimal permission principle
- Icon specifications

POPUP (if applicable):
- popup.html with full UI
- popup.js with all functionality
- popup.css with styling

CONTENT SCRIPT (if applicable):
- content.js with DOM manipulation logic
- How to inject and when
- Communication with popup/background

BACKGROUND SERVICE WORKER:
- background.js setup
- Event listeners
- Message passing architecture

OPTIONS PAGE (if applicable):
- options.html
- options.js with settings persistence
- Settings schema

MESSAGE PASSING:
- Communication architecture between all parts
- Message types and handlers
- Error handling for messaging

STORAGE LAYER:
- Data schema
- Read and write helpers
- Sync vs local decision

CONTEXT MENUS (if applicable):
- Menu registration
- Click handlers

PUBLISHING:
- Chrome Web Store submission checklist
- Privacy policy requirements
- Store listing copy (name, description, screenshots guidance)