Waterfox is a free and open-sourceweb browser and fork of Firefox. It claims to be ethical and user-centric, emphasizing performance and privacy.[2] There are official Waterfox releases for Windows, macOS, Linux and Android.[3][4] It was initially created to provide official 64-bit support, back when Firefox was only available for 32-bit systems.[5]
Waterfox shares core features and technologies like the Gecko browser engine[6] and support for Firefox Add-ons[7] with Firefox. It is also compatible with Google Chrome and Opera extensions.[2] It disables telemetry and Pocket by default, which are present in Firefox builds. However, it collects technical information about the user's device to update properly.[5]
Waterfox Classic is a version of the browser based on an older version of the Gecko engine that supports legacy XUL and XPCOM add-on capabilities that Firefox removed in version 57.[8][9] It is still partially maintained with fixes and patches from Waterfox and Firefox ESR releases. However, its development has been separated due to several changes from Waterfox that are otherwise unapplicable.[10]
Waterfox Classic has multiple unpatched security advisories. The developer states that "changes between versions so numerous between ESRs making merging difficult if not impossible".[11][10]
According to Exodus,[13] these are the same as the trackers used by Firefox, with the notable exclusion of the Adjust marketing platform that only Firefox uses.
Waterfox was first released by Alex Kontos[14][5] on 27 March 2011 for 64-bit Windows. The macOS build was introduced on 14 May 2015 with the release of version 38.0,[15] the Linux build was introduced on 20 December 2016 with the release of version 50.0,[16] and an Android build was first introduced on 10 October 2017 in version 55.2.2.[17]
From 22 July 2015 to 12 November 2015, Waterfox had its own search-engine called "Storm" that would raise funds for charity and Waterfox. Storm was developed with over £2 million of investor funding and powered by Yahoo! Search.[18][19][20]
In December 2019, System1, an advertising company which portrays itself as privacy-focused,[21] acquired Waterfox.[22][23] In July 2023, Alex Kontos announced that Waterfox had been turned into an independent project again.[24]
An Android release of the browser was made available via the Google Play Store in November 2023.[25]