Alternatives

Mercury alternatives for AI agents.

Compare similar skills by workflow fit, trust score, quality, GitHub adoption, maintenance, and install readiness.

Current skill

Mercury

Firefox fork with compiler optimizations and patches from Librewolf, Waterfox, and GNU IceCat.

72
Quality
84
Trust
1.5K
Stars
#1

Donutbrowser

Similarity 131Trust 91Excellent 100

Simple Yet Powerful Anti-Detect Browser ๐Ÿฉ

3.0K starsJun 13, 2026 pushlegal-complianceRustPrivacy
$ npx skills add zhom/donutbrowser
#2

User.Js

Similarity 129Trust 91Excellent 100

user.js -- Firefox configuration hardening

2.9K starsApr 7, 2026 pushlegal-complianceJavaScriptPrivacy
$ npx skills add pyllyukko/user.js
#3

Librefox

Similarity 129Trust 80Strong 73

Librefox: Firefox with privacy enhancements

1.8K starsMar 28, 2021 pushlegal-complianceJavaScriptPrivacy
$ npx skills add intika/Librefox
#4

Duckduckgo Privacy Extension

Similarity 128Trust 91Excellent 100

DuckDuckGo Privacy Essentials browser extension for Firefox, Chrome.

1.5K starsJun 16, 2026 pushlegal-complianceJavaScriptPrivacy
$ npx skills add duckduckgo/duckduckgo-privacy-extension
#5

CanvasBlocker

Similarity 126Trust 89Excellent 93

A Firefox extension to protect from being fingerprinted.

1.5K starsFeb 20, 2026 pushlegal-complianceJavaScriptPrivacy
$ npx skills add kkapsner/CanvasBlocker
#6

WebLibre

Similarity 125Trust 85Excellent 86

A libre Android browser built from scratch on Gecko. Privacy by default, powerful tab containers, and a local-first search engine.

791 starsJun 12, 2026 pushlegal-complianceDartPrivacy
$ npx skills add FaFre/WebLibre
#7

Fingerprint Chromium

Similarity 123Trust 89Excellent 100

An open source fingerprint browser based on Ungoogled Chromium. ๆŒ‡็บนๆต่งˆๅ™จ ้š็งๆต่งˆๅ™จ

2.7K starsApr 13, 2026 pushlegal-compliancePrivacyClaude Code
$ npx skills add adryfish/fingerprint-chromium
#8

OnionBrowser

Similarity 122Trust 89Excellent 100

An open-source, privacy-enhancing web browser for iOS, utilizing the Tor anonymity network

2.6K starsJun 15, 2026 pushlegal-complianceSwiftPrivacy
$ npx skills add OnionBrowser/OnionBrowser
#9

Privacy Settings

Similarity 122Trust 92Excellent 100

Guide to privacy settings for most major software and services.

1.9K starsJun 15, 2026 pushlegal-compliancePrivacyClaude Code
$ npx skills add StellarSand/privacy-settings
#10

Browser Extension

Similarity 122Trust 93Excellent 100

A browser extension that redirects popular sites to alternative privacy friendly frontends

3.9K starsMay 28, 2026 pushlegal-complianceJavaScriptPrivacy
$ npx skills add libredirect/browser_extension
#11

Privacybadger

Similarity 121Trust 89Excellent 100

Privacy Badger is a browser extension that automatically learns to block hidden trackers

3.8K starsJun 15, 2026 pushlegal-complianceJavaScriptPrivacy
$ npx skills add EFForg/privacybadger
#12

Vanadium

Similarity 121Trust 85Excellent 99

Privacy and security enhanced releases of Chromium for GrapheneOS. Vanadium provides the WebView and standard user-facing browser on GrapheneOS. It depends on hardening in other GrapheneOS repositories and doesn't include patches not relevant to the build targets used on GrapheneOS.

1.9K starsJun 12, 2026 pushlegal-complianceShellPrivacy
$ npx skills add GrapheneOS/Vanadium
#13

Hosts

Similarity 120Trust 98Excellent 100

๐Ÿ”’ Consolidating and extending hosts files from several well-curated sources. Optionally pick extensions for porn, social media, and other categories.

31K starsJun 11, 2026 pushlegal-compliancePythonPrivacy
$ npx skills add StevenBlack/hosts
#14

InvisiProxy

Similarity 120Trust 92Excellent 100

InvisiProxy LTS is a web proxy service that helps you access websites that may be blocked by your network, government or policy all within your browser with no download or setup. It does this securely and with additional privacy features. Browse Tor/Onion sites in any browser, hide browsing activity and bypass filters. (Star if you fork it!)

1.5K starsJun 12, 2026 pushlegal-complianceJavaScriptPrivacy
$ npx skills add QuiteAFancyEmerald/InvisiProxy
#15

Ghostery Extension

Similarity 120Trust 90Excellent 100

Ghostery Browser Extension for Firefox, Chrome, Opera, Edge and Safari

1.7K starsJun 16, 2026 pushlegal-complianceJavaScriptPrivacy
$ npx skills add ghostery/ghostery-extension
#16

Win11Debloat

Similarity 120Trust 95Excellent 100

A simple, lightweight PowerShell script that allows you to remove pre-installed apps, disable telemetry, as well as perform various other changes to declutter and customize your Windows experience. Win11Debloat works for both Windows 10 and Windows 11.

48K starsJun 14, 2026 pushlegal-compliancePowerShellPrivacy
$ npx skills add Raphire/Win11Debloat

How to choose

When should you switch?

Use an alternative when it has a clearer install path, higher trust score, fresher maintenance, or better platform fit for your current agent stack. Keep Mercury if it already passes your workflow test and repository review.

Next step

Compare top candidates side by side

Open the compare page, test the install commands in a sandbox, and check each repository before using a skill in production.