GreasePanda by Sudosoft

Rule the web your way with GreasePanda — a modern, fast, and feature-rich userscript manager for Firefox. Customize websites, automate tasks, enhance privacy, and run your favorite scripts with ease.

Compatible with scripts from GreasyFork, OpenUserJS, and UserScript.Zone.

Key Features:
- Powerful In-Browser Code Editor: CodeMirror engine with real-time linting, syntax highlighting, search & replace, and auto-formatting.
- Cross-Device Cloud Sync & Backup: Seamlessly sync scripts via Google Drive and Dropbox, or export/import offline JSON backups.
- 1-Click Script Installation: Auto-detect and install userscripts from popular script repositories.
- Per-Site Script Management: Easily toggle, edit, search, and configure domain rules directly from the popup panel.
- Lightweight & Privacy-First: Zero telemetry tracking — your scripts and browsing activity stay strictly on your device.