Firefox fork with compiler optimizations and patches from Librewolf, Waterfox, and GNU IceCat. It aims to be the Firefox equivalent of my main project: Thorium (a Chromium fork).
Ultimatum Alternatives
Ultimatum is described as 'Chromium fork with webextensions support on Android, anti-detect browser capabilities, web3.0 support and much more' and is an app in the web browsers category. There are more than 25 alternatives to Ultimatum for a variety of platforms, including Android, Windows, Mac, Android Tablet and Linux apps. The best Ultimatum alternative is Mozilla Firefox, which is both free and Open Source. Other great apps like Ultimatum are Zen Browser, Brave, Google Chrome and Vivaldi.
Alternatives list
- 63 Mercury Browser alternatives
- 89 Puffin alternatives
Puffin speeds up mobile browsing by shifting the workload from the resource-limited devices to the cloud servers, and resource-demanding webpages can run super-fast on your phones or tablets.
Cost / License
- Freemium (Subscription)
- Proprietary
Application type
Platforms
- Mac
- Windows
- Android
- iPhone
- Android Tablet
- iPad
- Android TV


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- 81 Sigma AI Browser alternatives
An AI-driven browser providing a toolbox for chatting, generating content and visuals, translations, while ensuring privacy with tracker blocking, seamless integration, and a lightweight design, ideal for content creators, business teams, and everyday users.
Cost / License
- Free
- Proprietary
Application type
Platforms
- Mac
- Windows
- Online
- Android
- iPhone
- Linux
- Fedora
- Ubuntu



Sigma AI Browser is the most popular Web-based alternative to Ultimatum.
- Sigma AI Browser is Free and Proprietary
- Sigma AI Browser is Lightweight and Privacy focused
A Full-Featured Mobile and Desktop Browser App (such as the Google Chrome mobile browser) created using Flutter and the features offered by the flutter_inappwebview plugin.



Browse with AI assistance using an advanced web browser that supports Chrome and Edge extensions. Features include incognito mode, multilingual support, customizable homepage, video streaming, and robust ad blocking capabilities.



Boasts advanced ad blocking, robust data encryption, secure file vault with encrypted downloads, real-time web protection, privacy cleaner, browser lock with passcode or biometrics, flexible search engine choice, tracking protection, and dark mode support.


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- 52 Carbon Browser alternatives
Carbon is a free and open-source web browser developed by Carbon X Labs based on a custom fork of the Chromium web browser and its powerful Blink engine. Carbon is a privacy-focused browser, which automatically blocks online ads and website trackers by default.



Relixor is a custom Android browser based on Kiwi Browser (Chromium), designed for power users who want full Chrome desktop extension support on mobile.

Dashob Browser is the most popular commercial alternative to Ultimatum.
- Dashob Browser is Paid and Open Source
Edgescape Navigator is a web browser which is literally just a web browser. It has no bloatware, no mess and no unnecessary features. Just buttons for forward, backward, reload, homepage and about and also the addressbar. It is powered by EdgeWebView2 runtime.























