Chrome Mask
Makes Firefox wear a mask to look like Chrome to websites that otherwise won't work.
Chrome Mask - Firefox Extension for Site Compatibility
"Chrome Mask" is a Firefox extension that allows users to selectively spoof as Chrome on specific websites. With a one-click toggle, it automatically updates the Chrome User Agent string every 24 hours and adjusts for the correct Operating System. Additionally, it shims JavaScript attributes like `navigator.vendor` and the `chrome` object to bypass common browser checks, enhancing compatibility while using Firefox.
Add-on stats
Weekly download count: 516
Firefox on Android: Yes
Risk impact: High risk impact 
Risk likelihood:
Manifest version: 2
Permissions:
- storage
- tabs
- webRequest
- webRequestBlocking
- <all_urls>
Size: 52.72K
Email: ch*****@dennis-schubert.de
URLs: Website ,Privacy policy
Ranking
# 896 ▲ 15
Other platforms
Not available on Chrome
Not available on Android
Not available on Edge
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Add-on summary
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- Unlike some extensions with outdated version numbers and UA strings, this extension automatically updates the Chrome version it pretends to be.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 global `chrome` object, to pass common browser checks.
User reviews
These summaries are automatically generated weekly using AI based on recent user reviews.
Firefox Browser Add-ons does not verify user reviews, so some user reviews may be inaccurate,
spammy, or outdated. Pros
- User-friendly and easy to use
- Keeps up to date with the latest Chrome version
- Effective in certain scenarios (e.g., works on YouTube)
- Humorous branding as "wearing a mask" adds to the appeal
Cons
- Ineffective at fully masking Firefox; sites still detect it as Firefox
- Specific features do not work, such as on GeForce Now
- Requires an option to stay enabled across different sites
- Limited effectiveness on certain Google features
Most mentioned
- The add-on does not effectively mask Firefox as Chrome
- Users desire a persistent on-option for masking functionality
- Inconsistencies in feature availability compared to using Chrome
User reviews
by Firefox user 15668067, 2025-01-23
Great! works like a charm
by NinetyRalph, 2025-01-21
always up to date to the latest chrome version, not problems so far
by renzomorini_857, 2025-01-19
Add-on safety
Risk impact
Chrome Mask requires some sensitive permissions that could impact your browser and data security. Exercise caution before installing.
Risk likelihood
Chrome Mask may not be trust-worthy. Avoid installing if possible unless you really trust this publisher.
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