Screen Spoofer Firefox

Screen Spoofer

Simulate websites in custom screen sizes via a secure popup. Perfect for developers testing responsive design and layouts.

Features & Capabilities

Screen Spoofer is a powerful screen simulation utility designed for developers who need to test websites in different screen resolutions. Whether you're working on a responsive layout, testing device-specific behavior, or previewing UI changes, this extension lets you simulate screens quickly and securely.

🔹 Features:

  • Simulate custom or predefined screen resolutions
  • Choose from popular devices like iPhone, Android, tablets, etc.
  • Opens a popup window with exact dimensions
  • Clean and easy-to-use popup interface
  • Secure access only for authorized users

Ideal for:

  • Frontend developers
  • UI/UX designers
  • QA engineers

No third-party frameworks or build tools used. This extension is built entirely using HTML, CSS, and vanilla JavaScript for performance and simplicity.

Note: This extension is intended for internal development use only.

User Growth & Download Statistics

Contact the developer

Chrome-Stats does not own this Firefox add-on. Please use these information below to contact the Firefox add-on developer.
Developed by:
Screen Spoofer
Firefox Add-ons Store
https://addons.mozilla.org/firefox/addon/screen-spoofer/
Email:
un*****@gmail.com

Permission Change History

2025-06-25: Version 1.3 → 1.7
Add Permissions: webRequest webRequestBlocking <all_urls>
Remove Permissions: https://uniqueincomeus.site/
2025-06-22: Version 1.1 → 1.2
Add Permissions: https://uniqueincomeus.site/

User Reviews

Scam/malware. It asks you to login with your email and password.
by Fi*****, 2025-10-22
View all user reviews ›

Is Screen Spoofer Safe?

Risk impact
Risk impact measures the level of extra permissions an extension has access to. A low risk impact extension cannot do much harms, whereas a high risk impact extension can do a lot of damage like stealing your password, bypassing your security settings, and accessing your personal data. High risk impact extensions are not necessarily malicious. However, if they do turn malicious, they can be very harmful.

Screen Spoofer requires a lot of sensitive permissions. Exercise caution before installing.

Risk impact analysis details
  • Critical Grants access to browser tabs, which can be used to track user browsing habits and history, presenting a privacy concern.
  • Critical ****** ****** ** *** ********* ****** * *********** ******** **** ** ** *** ******* *** ****** **** **** *** ******* *****
  • High ****** *** ********* ** ******* *** ******* ******* ** ****** *** *** ******** ******
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  • High ******* ******* **** *** ****** ***** *** ***** ** ******* **** ********* ********* ** * *********** *****
Risk likelihood
Risk likelihood measures the probability that a Firefox add-on may turn malicious. This is determined by the publisher and the Firefox add-on reputation on Firefox Add-ons Store, the amount of time the Firefox add-on has been around, and other signals about the Firefox add-on. Our algorithms are not perfect, and are subject to change as we discover new ways to detect malicious extensions. We recommend that you always exercise caution when installing a Firefox add-on.

Screen Spoofer is probably trust-worthy. Prefer other publishers if available. Exercise caution when installing this add-on.

Risk likelihood analysis details
  • High This extension has low user count. Unpopular extensions may not be stable or safe.
  • Medium **** ********* *** *** **** *******
  • Low **** ********* *** ******* **** **** * ****** **** ***** ******** *** **** ****** ** ** ****** *** *****
  • Low **** ********* *** ***** **** **** * ****** **** ***** ********** *** **** ****** ** ** ****** *** *****
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Best Screen Spoofer Alternatives

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