Alternatives to Basilisk
Non-Chromium browser from the Pale Moon ecosystem that keeps XUL extensions. The listings below can replace it for an important use case. Each note says what changes if you switch.
The original
Basilisk
Non-Chromium browser from the Pale Moon ecosystem that keeps XUL extensions.
Replacements
Listings that take over the same core job as Basilisk.
Pale Moon
Independent Firefox fork with the classic interface and XUL extension support.
Pale Moon comes from the same ecosystem and keeps the pre-Quantum Gecko engine and XUL extensions, though its official binaries carry a separate branding licence.
SeaMonkey
Classic internet suite combining a browser, email, feed reader, IRC client and HTML editor.
SeaMonkey also tracks an older Mozilla codebase and bundles email, a feed reader, IRC and an HTML editor with the browser, while web compatibility still trails current browsers.
Waterfox
A Firefox build with telemetry stripped out, ad blocking and encrypted DNS turned on from the start.
Waterfox moves to a current Firefox base with telemetry removed and ad blocking on, so Firefox extensions replace the classic XUL extensions Basilisk runs.
Firefox
The main browser not built on Chromium, with tracking protection turned on by default.
Firefox gives current web compatibility and strong modern extension support with tracking protection by default, adds mobile builds, but drops the XUL extensions Basilisk keeps.
Similar software
Related functionality, not a direct replacement.
Otter Browser
Use a configurable browser inspired by classic Opera.
Falkon
Lightweight KDE browser built on QtWebEngine.
GNU IceCat
The GNU Project's build of Firefox containing only free software, with added privacy extensions.
Mercury
A Firefox fork with compiler optimizations and privacy patches taken from LibreWolf, Waterfox and GNU IceCat.
LibreWolf
A Firefox build with the privacy settings already turned up and uBlock Origin included.