Chrome Web StoreNo malware found
In code review
Our reviewer read this extension’s code and found no malicious behaviour. An automated risk flag was reviewed and overturned.
21 indicators in this extension
Every finding is verified by a security analyst. Unlock the code evidence, indicators and version history.
What our analysis found
Viewport Resizer: Ultimate Device Emulator & Website Testin…, used by 80,000 people, showed no malicious code in Extension Auditor's review. Its permissions mean it can read and change data on all websites and can inject scripts into pages. It comes from a trusted publisher and was last updated in December 2025.
Analyst notes
The extension is a browser tool for responsive design testing, using permissions (activeTab, scripting, declarativeNetRequest) to inject a toolbar and modify headers only on the active tab upon user click. No external data exfiltration, no tracking, no unauthorized code execution. The ML risk score of 0.00 already indicates low risk; the critical risk-engine alarm is due to the permissive permissions but these are necessary for the extension's intended functionality. The codebase is transparent with no obfuscation beyond minification, and all network activity is confined to local extension resources. User configurations are stored locally via chrome.storage.local.
Viewport Resizer: Ultimate Device Emulator & Website Testing Tool Chrome extension security report
ID: kapnjjcfcncngkadhpmijlkblpibdcgm
Supported Languages
Extension Info & Metadata
Publisher Contextual Analysis
- Author
- Malte Wassermann
- Privacy
- Privacy Policy
- MX records exist
- Yes
- Domain exists
- Yes
- Is disposable
- No
- Is role-based
- No
- Mailbox exists
- Yes
- Website
- Visit
Screenshots & videos
Install growth
Each row lists a threat category the scanner evaluates. A checkmark means the review ran and found no matching issues in that category for this version.
Data Exfiltration
Code review completed; no malicious patterns detected for this category.
Unauthorized Data Collection
Code review completed; no malicious patterns detected for this category.
Network Interception
Code review completed; no malicious patterns detected for this category.
Code Injection
Code review completed; no malicious patterns detected for this category.
Credential Theft
Code review completed; no malicious patterns detected for this category.
Obfuscation
Code review completed; no malicious patterns detected for this category.
Tracking
Code review completed; no malicious patterns detected for this category.
Privilege Escalation
Code review completed; no malicious patterns detected for this category.
Phishing
Code review completed; no malicious patterns detected for this category.
Remote Code Loading
Code review completed; no malicious patterns detected for this category.
Other
Code review completed; no malicious patterns detected for this category.
21 indicators in this extension
Every finding is verified by a security analyst. Unlock the code evidence, indicators and version history.
About this extension
Emulate devices, resize screens, and perfect your web design effortlessly with this cutting-edge testing and presentation tool.
Read the publisher’s full description
Enhance your web design experience with our dynamic testing and presentation tool, designed to create, test, and showcase your digital experiences on any device, from wearables to very big screens. Customize your workspace fully and use or create your own device mockups, explore various display resolutions, and harness advanced emulation features like touch fingerprint simulation, user-agent emulation, and breakpoint guide, all within a professional-grade environment built for high-quality development and debugging. Push your limits with an intuitive zoomable workspace, precise ruler and grid tools, and a sleek presentation mode called 'Coffee Mode' — think of this tool as a first-level approximation of how your digital experience looks and feels across multiple devices. Limitations: While our tool provides comprehensive device simulations, it does not replace the need for physical device testing.
User reviews
Extension files
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URLs
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21 indicators in this extension
Every finding is verified by a security analyst. Unlock the code evidence, indicators and version history.
Code Diff
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0 changed files detected
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