GreasePanda by Sudosoft
Rule the web your way — feature-rich userscript manager to customize, automate, and dominate every site with ease.
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About this extension
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.
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.
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Permissions and data
Required permissions:
- Input data to the clipboard
- Download files and read and modify the browser’s download history
- Display notifications to you
- Access browser tabs
- Access browser activity during navigation
- Access your data for all websites
Optional permissions:
- Access your data for all websites
Data collection:
- The developer says this extension doesn't require data collection.
More information
- Add-on Links
- Version
- 2.2.16
- Size
- 2.5 MB
- Last updated
- 4 days ago (Sep 14, 2026)
- Related Categories
- License
- All Rights Reserved
- Version History
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