
Chrome Mask by Dennis Schubert
Makes Firefox wear a mask to look like Chrome to websites that block Firefox otherwise.
You'll need Firefox to use this extension
Extension Metadata
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About this extension
A little Firefox Extension that provides a one-click toggle to spoof as Chrome in Firefox - or, in other words, to put on the Chrome Mask. There are a lot of generic "User Agent spoof" extensions. However, this extension does a few things differently:
- Instead of overriding the User Agent string on all sites, this extension allows you to only look like Chrome on specific sites.
- Unlike some extensions with outdated version numbers and UA strings, this extension automatically updates the Chrome version it pretends to be. It does that by querying a simple API every 24 hours.
- You don't have to pick the correct Operating System manually; this extension does it for you.
- This extension also shims a few additional JavaScript attributes, like
navigator.vendor
or the globalchrome
object, to pass common browser checks.
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This add-on needs to:
- Access browser tabs
- Access your data for all websites
More information
- Add-on Links
- Version
- 5.0.1
- Size
- 54.22 KB
- Last updated
- 16 days ago (Mar 17, 2025)
- Related Categories
- License
- MIT License
- Privacy Policy
- Read the privacy policy for this add-on
- Version History
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Release notes for 5.0.1
- Added a settings UI to add or remove sites from Chrome Mask without being on that site. Thanks to @dannycolin for the initial prototype here.
- Added an explicit warning to only use Chrome Mask on sites that claim "Firefox is not supported", because using it on other sites will break things.
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