Despite what the threads I read say, Discourse does not support UXP browsers and it’s forks like Pale Moon, Basilisk, etc… Any idea why or how this can be fixed? Does not get fixed when spoofing as Firefox in User Agent either. [Screenshot 2026-05-27 at 02.18.35] Pale Moon is not an old browser b…

hi there :wave: welcome :slight_smile: from What is Discourse? | Discourse - Civilized Discussion ) [image] this has also been discussed before here: Discourse is incompatible with Palemoon web browser (and older Firefox)

Is there anything Pale Moon can do to meet these guidelines? I’m happy to oblige to implement any missing JavaScript/CSS.

If it’s your own forum, this plugin might help: [image] Dumbcourse – Old-browser friendly UI at /dumb (D-pad + small screens) Plugin information_source Summary Dumbcourse adds a lightweight, old-browser friendly Discourse UI under /dumb, designed for D-pad…

Will take a look at it. Thanks. :+1:

Discourse does not support UXP browsers and it's forks (e.g, Pale Moon)

Support

david (David Taylor) May 27, 2026, 4:52am 5

If you open the browser developer console, you should see a log of the failed JS/CSS feature-detections.

Topic		Replies	Views
Discourse is incompatible with Palemoon web browser (and older Firefox) Support	3	200	September 22, 2025
Discourse and Pale Moon browser Support	10	1991	May 28, 2020
Better copy for browser is "too old to work on this site" UX	12	1425	July 23, 2022
Discourse not working on an old phone with an unsupported browser Support	15	2235	February 7, 2020
Browser detection script (only!) malfunctioning on Pale Moon 32.x Support	2	510	August 3, 2023

Discourse does not support UXP browsers and it's forks (e.g, Pale Moon)

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