Shieldmonkey by toshs
An Open Source, Security-first Userscript manager.
Available on Firefox for Android™Available on Firefox for Android™
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About this extension
ShieldMonkey is a Manifest V3 compliant user script manager formatted with security and auditability as its top priorities.
Unlike traditional script managers, ShieldMonkey prioritizes safety over convenience. It is engineered to absolutely prevent unintended background communications and the silent execution of malicious scripts.
【Key Features】
🛡️ Strict Content Security Policy (Strict CSP) We aggressively block external connections from background scripts and injected pages. Features that bypass CORS (such as GM_xmlHttpRequest) and the dynamic loading of external scripts are prohibited to minimize the risk of data leakage.
🚫 No Auto-Updates or Auto-Backups To ensure that scripts are never modified without your knowledge and that no data is sent to external servers, we have intentionally excluded cloud backups and automatic script update features. All updates are performed manually under your supervision.
🔍 High Auditability & Transparency The extension's source code within the build is intentionally left un-minified (not compressed or obfuscated) to prioritize ease of auditing. You can verify the code contents yourself with confidence.
💻 Superior Developer Experience The integrated script editor is powered by the Monaco Editor. You can write and manage secure scripts efficiently with TypeScript/JavaScript syntax highlighting and completion.
📦 Supply Chain Security We enforce robust security measures throughout our development process to proactively prevent the execution of malicious scripts from dependencies.
【Recommended For】
Users who place the highest value on privacy and security.
Users who demand complete control over browser extension behavior.
Enterprise environments with strict policies regarding extension external communications.
Protect your browser environment with ShieldMonkey. Open Source Project: https://github.com/shieldmonkey/shieldmonkey
Unlike traditional script managers, ShieldMonkey prioritizes safety over convenience. It is engineered to absolutely prevent unintended background communications and the silent execution of malicious scripts.
【Key Features】
🛡️ Strict Content Security Policy (Strict CSP) We aggressively block external connections from background scripts and injected pages. Features that bypass CORS (such as GM_xmlHttpRequest) and the dynamic loading of external scripts are prohibited to minimize the risk of data leakage.
🚫 No Auto-Updates or Auto-Backups To ensure that scripts are never modified without your knowledge and that no data is sent to external servers, we have intentionally excluded cloud backups and automatic script update features. All updates are performed manually under your supervision.
🔍 High Auditability & Transparency The extension's source code within the build is intentionally left un-minified (not compressed or obfuscated) to prioritize ease of auditing. You can verify the code contents yourself with confidence.
💻 Superior Developer Experience The integrated script editor is powered by the Monaco Editor. You can write and manage secure scripts efficiently with TypeScript/JavaScript syntax highlighting and completion.
📦 Supply Chain Security We enforce robust security measures throughout our development process to proactively prevent the execution of malicious scripts from dependencies.
【Recommended For】
Users who place the highest value on privacy and security.
Users who demand complete control over browser extension behavior.
Enterprise environments with strict policies regarding extension external communications.
Protect your browser environment with ShieldMonkey. Open Source Project: https://github.com/shieldmonkey/shieldmonkey
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Permissions and data
Required permissions:
- Block content on any page
- Download files and read and modify the browser’s download history
- Display notifications to you
- Access browser tabs
- Access browser activity during navigation
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
- 0.1.4
- Size
- 10.72 MB
- Last updated
- a day ago (Feb 6, 2026)
- Related Categories
- License
- MIT License
- Version History
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