| Windows version |
Firefox version |
Notes |
|---|---|---|
| NT 3.51, 95 | 1.5 | Only works partially on NT 3.51 |
| NT4, 98, Me | 2 | Wikipedia 2.0 system requirements 3.0 system requirements |
| 2000, XP SP1 | 12 | Support was cut off at FF13, but the last ESR version was 10.0.12, released on 2013/01/08, the same day as FF18. Source |
| XP SP2 ~ Vista | 52esr | 32bit versions only. Source |
| 7 ~ 8.1 | 115esr | Source 1 Source 2 Lifespan for 115esr is extended |
Major redesigns of its graphical user interface occurred on versions 4.0 (Strata) in March 2011, 29.0 (Australis) in April 2014, 57.0 (Photon) in November 2017, and 89.0 (Proton) in June 2021. (Source: Wikipedia)
3.6 was the last version before Firefox transitioned to a rapid release schedule like that of Chrome.
56 was the last version with XUL extensions support.
84 was the last version with flash support. Source
Because new UI designs waste too much space.
(Pale Moon, Basilisk, and further forks of these)
Pale Moon has the FF4~29 look (Strata), while Basilisk has the FF29~56 look (Australis).
roytam's forks "New Moon" (Pale Moon) and "Serpent" (Basilisk) support XP. (Blog, MSFN thread, Downloads)
Last update was version 2022.11. Based on something before FF57. Has WebExtensions support (UXP doesn't). Has the Australis look.
I used it for a while when FF57 was just released, to take refuge from the WebExtension apocalypse, but now I don't see a point in using it any more. Waterfox Classic hadn't been keeping up with the modern web for some time even before it was discontinued. For WebExtensions just use the latest Firefox. For Australis just use Basilisk.
A browser that works on XP, the current MyPal is based on Firefox 68.
A project led by Matt A. Tobin who used to be associated with the Pale Moon team. Used to work on UXP projects, but stopped as of 2024. Programs made included "Interlink" (UXP Thunderbird fork) and "Borealis Navigator" (UXP Firefox fork), though builds were only available for the former. roytam has for-WinXP forks of both.
Latest Releases for Legacy Platforms
Also has a fork by roytam, but seems to be abandoned since December 2024.
Latest official version as of February 2025 still supports XP SP3. It's possible to run K-Meleon 76 on Windows XP SP2 using a kernel replacement. (Details on forum)