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.

Coming Soon

Reading Stats Dashboard

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

Coming Soon

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 & Edge (PC)
Firefox Add-ons For PC & Mobile (Android)