
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- Unlike some extensions with outdated version numbers and UA strings, this extension automatically updates the Chrome version it pretends to be.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.
Rated 4.5 by 87 reviewers
Permissions and dataLearn more
Required permissions:
- Access browser tabs
- Access your data for all websites
More information
- Add-on Links
- Version
- 7.0.0
- Size
- 58.62 KB
- Last updated
- 7 days ago (Aug 25, 2025)
- Related Categories
- License
- MIT License
- Privacy Policy
- Read the privacy policy for this add-on
- Version History
- Add to collection
Release notes for 7.0.0
- Adds support for an optional keyboard shortcut to toggle Chrome Mask. Thank you very much, @dannycolin!
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