User Manuals & Guides

Learn how to make the most of AO3 Advanced Marker with our comprehensive step-by-step tutorials.

Cloud Sync Setup

Learn how to sync your reading history, stats, and reviews across all your devices using Google Drive or JSONBin.io.

Choose Provider →

Color System Guide

Learn how the reading status color system works, where it appears on AO3, and how to customize it.

Read Guide →

Chapter Reviews

Learn how to annotate chapters, write detailed reviews as you read, and manage your notes.

Read Guide →

Text Highlights

Discover how to select text, apply colors, use the minimap, and manage your highlights.

Read Guide →

Want To Read (WTR) System

A full guide to managing your reading queue directly from the AO3 header and using WTR filters on your bookmarks.

Read Guide →

Reading Stats Dashboard

Understand your reading habits, track your yearly goals, and explore your personal fandom analytics.

Read Guide →

Choose Your Sync Provider

Select how you'd like to back up and sync your reading data across devices.

Google Drive One-click auth. No API keys or manual config required. Recommended → JSONBin.io API-based setup. No Google account needed. Manual Setup →

Choose your browser

Select the store for your browser to install the extension.

Chrome Web Store Also for Opera, Brave & Edge (PC)
Firefox Add-ons For PC & Mobile (Android)