Old extensions are not on AMO anymore. Sources:
The persistent search for the is more than nostalgia—it’s a protest against the homogenization of the web. Power users want control, privacy, and the ability to run the tools they paid for. waterfox browser old version
| Extension | Purpose | |-----------|---------| | | Bring back Firefox 4–28 UI (status bar, square tabs, separate search bar) | | Tab Mix Plus | Infinite tab control (multi-row, mouse gestures, session manager, tab groups) | | DownThemAll! | Advanced download manager with metalink support | | uBlock Origin (legacy) – version 1.16.4.30 works | | Pale Moon’s All-in-One Sidebar | Massive UI enhancement | | NoScript (legacy) – version 5.1.9 | Old extensions are not on AMO anymore
If you must use an old version, restrict its use: | Extension | Purpose | |-----------|---------| | |
| Browser | Legacy Extension Support | Last Update | Best For | | :--- | :--- | :--- | :--- | | | Full XUL (Goanna engine) | Monthly (2024+) | Daily driver on old hardware | | Basilisk | Partial XUL + WebExtension | Monthly | Developers who need both old and new | | SeaMonkey | Suite-based (Mail/News) | Bi-monthly | Die-hard Netscape fans | | Waterfox Classic | Full XUL (frozen code) | 2022 (EOL) | Specific legacy corporate apps |
Before the major leap to G4 (based on newer Firefox code), G3 offered a balance of modern web compatibility and a lighter system footprint.
: Earlier iterations of the modern "current" branch. G3 was notably based on Firefox 78 and began supporting Chrome and Opera extensions.