Best Waterfox Alternatives in 2025

Looking for alternatives to Waterfox? In this comparison, we take a closer look at Waterfox alongside similar software solutions including Waterfox, Mozilla Firefox, Vivaldi Browser, AntiBrowserSpy, Mozilla Firefox ESR, UC Browser, Adobe Flash Player PPAPI and Opera Browser.

Our detailed comparison table highlights key features, pricing, and performance of these leading solutions, empowering you to make an informed decision. Whether you're seeking robust functionality, user-friendly design, or cost-effective alternatives, explore how Waterfox, Mozilla Firefox, Vivaldi Browser, AntiBrowserSpy, Mozilla Firefox ESR, UC Browser, Adobe Flash Player PPAPI and Opera Browser stack up to find the perfect software for your goals.

	Platform Support	Customization & Features	Privacy & Security
Waterfox	Supports 64-bit Windows, Linux, and macOS systems.	Offers a customizable browsing experience with support for many Firefox extensions and add-ons.	Focuses on user privacy with no telemetry data collection; open-source project with ethical focus.
Mozilla Firefox	Cross-platform support including Windows, Linux, macOS, Android and iOS.	Highly customizable with a wide variety of add-ons, customizable interface and themes.	Strong privacy protections including tracking protection, anti-phishing features and frequent security updates.
Vivaldi Browser	Available on Windows, macOS, Linux and mobile devices with multiple device support.	Highly customizable user interface with built-in ad blocker, note-taking, VPN and tab management features.	Strong privacy features including tracker blocking and blocked phishing detection integrated.
AntiBrowserSpy	Supports all major web browsers on Windows and Apple systems (Safari).	Offers options to manage privacy settings across multiple browsers with a simple interface.	Protects user privacy by cleaning browser data, settings, cache files; no free version available.
Mozilla Firefox ESR	Available on Windows, Linux, macOS; focused on desktop platforms.	Standard Firefox features with extended support and long-term stability; supports add-ons.	Enhanced privacy features with long-term support releases providing stability and fewer updates.
UC Browser	Available primarily on Android and iOS operating systems; supports multiple platforms.	Features built-in ad blocker, data compression, download manager and customizable themes.	Reported privacy concerns related to data collection despite built-in ad blockers; offers safe browsing measures.
Adobe Flash Player PPAPI	Supports Chromium-based browsers and other major web browsers on desktop platforms.	Supports playback of rich multimedia Flash content but limited customization related to browser features.	Frequent security patches to address vulnerabilities but generally presents security risks inherent to Flash technology.
Opera Browser	Cross-platform support including Windows, macOS, Linux, and Android.	Includes built-in ad blocker, VPN, battery saver mode, sidebar with messaging apps and extensive extension support.	Provides additional privacy through integrated VPN and ad-blocking features alongside security updates.

Platform Support

Waterfox	Supports 64-bit Windows, Linux, and macOS systems.
Mozilla Firefox	Cross-platform support including Windows, Linux, macOS, Android and iOS.
Vivaldi Browser	Available on Windows, macOS, Linux and mobile devices with multiple device support.
AntiBrowserSpy	Supports all major web browsers on Windows and Apple systems (Safari).
Mozilla Firefox ESR	Available on Windows, Linux, macOS; focused on desktop platforms.
UC Browser	Available primarily on Android and iOS operating systems; supports multiple platforms.
Adobe Flash Player PPAPI	Supports Chromium-based browsers and other major web browsers on desktop platforms.
Opera Browser	Cross-platform support including Windows, macOS, Linux, and Android.

Customization & Features

Waterfox	Offers a customizable browsing experience with support for many Firefox extensions and add-ons.
Mozilla Firefox	Highly customizable with a wide variety of add-ons, customizable interface and themes.
Vivaldi Browser	Highly customizable user interface with built-in ad blocker, note-taking, VPN and tab management features.
AntiBrowserSpy	Offers options to manage privacy settings across multiple browsers with a simple interface.
Mozilla Firefox ESR	Standard Firefox features with extended support and long-term stability; supports add-ons.
UC Browser	Features built-in ad blocker, data compression, download manager and customizable themes.
Adobe Flash Player PPAPI	Supports playback of rich multimedia Flash content but limited customization related to browser features.
Opera Browser	Includes built-in ad blocker, VPN, battery saver mode, sidebar with messaging apps and extensive extension support.

Privacy & Security

Waterfox	Focuses on user privacy with no telemetry data collection; open-source project with ethical focus.
Mozilla Firefox	Strong privacy protections including tracking protection, anti-phishing features and frequent security updates.
Vivaldi Browser	Strong privacy features including tracker blocking and blocked phishing detection integrated.
AntiBrowserSpy	Protects user privacy by cleaning browser data, settings, cache files; no free version available.
Mozilla Firefox ESR	Enhanced privacy features with long-term support releases providing stability and fewer updates.
UC Browser	Reported privacy concerns related to data collection despite built-in ad blockers; offers safe browsing measures.
Adobe Flash Player PPAPI	Frequent security patches to address vulnerabilities but generally presents security risks inherent to Flash technology.
Opera Browser	Provides additional privacy through integrated VPN and ad-blocking features alongside security updates.

Choosing the right software isn’t just about features. Size, license type, user ratings, and popularity also matter.

This quick comparison shows how Waterfox stacks up against Waterfox, Mozilla Firefox, Vivaldi Browser, AntiBrowserSpy, Mozilla Firefox ESR, UC Browser, Adobe Flash Player PPAPI and Opera Browser in these key areas—helping you find the best alternative for your needs.

	Size	License	Popularity
Waterfox	66.5MB	Commercial	0%
Mozilla Firefox	43.4MB	Freeware	100%
Vivaldi Browser		Freeware	3%
AntiBrowserSpy	9.3MB	Commercial	4%
Mozilla Firefox ESR	37.4MB	Open Source	12%
UC Browser	1.2MB	Commercial	1%
Adobe Flash Player PPAPI	1.2MB	Demo	6%
Opera Browser	0.8MB	Freeware	59%

Size

Waterfox	66.5MB
Mozilla Firefox	43.4MB
Vivaldi Browser
AntiBrowserSpy	9.3MB
Mozilla Firefox ESR	37.4MB
UC Browser	1.2MB
Adobe Flash Player PPAPI	1.2MB
Opera Browser	0.8MB

License

Waterfox	Commercial
Mozilla Firefox	Freeware
Vivaldi Browser	Freeware
AntiBrowserSpy	Commercial
Mozilla Firefox ESR	Open Source
UC Browser	Commercial
Adobe Flash Player PPAPI	Demo
Opera Browser	Freeware

Rating

Waterfox
Mozilla Firefox
Vivaldi Browser
AntiBrowserSpy
Mozilla Firefox ESR
UC Browser
Adobe Flash Player PPAPI
Opera Browser

Popularity

Waterfox	0%
Mozilla Firefox	100%
Vivaldi Browser	3%
AntiBrowserSpy	4%
Mozilla Firefox ESR	12%
UC Browser	1%
Adobe Flash Player PPAPI	6%
Opera Browser	59%