Rustdoc Settings Sync is a Chrome add-on developed by notriddle that allows users to sync settings between Rust documentation pages. By default, settings in rustdoc are stored as Site Data, which means that each crate has its own separate settings because each crate is in its own folder and Chrome treats every folder as a different site.

This add-on solves this issue by enabling multiple rustdoc pages to use the same theme and other settings. With Rustdoc Settings Sync, users can easily sync their preferred settings across all their Rust documentation pages, providing a consistent and streamlined browsing experience. This add-on is free to use and is a valuable tool for developers and enthusiasts working with Rust documentation.