How to Enable Xul Extensions Pale Moon - Pale Moon

Go to Pale Moon's preferences and toggle the XUL extensions setting in the advanced config panel to enable legacy add-ons support. Pale Moon 34.1.0 is specifically designed to run XUL extensions that Firefox abandoned years ago.

Why Pale Moon Supports XUL

Pale Moon kept XUL support alive since its creation in 2009. While Firefox ditched this extension format for WebExtensions, Pale Moon stayed loyal to the format. That's the whole appeal — you get a Firefox-based browser that actually lets you use old-school extensions. No compromises.

No forced modernization.

The browser's classic interface pairs perfectly with legacy add-ons. Your favorite Firefox extensions from the golden era? They'll work here.

How to Enable XUL Extensions in Pale Moon

Open Pale Moon and type `about:config` into the address bar. Hit Enter. Search for `extensions.xul` in the preferences window. You'll see boolean settings for XUL support — make sure they're set to `true`.

Most versions have XUL enabled by default, but checking confirms it's active.

Next, visit the add-ons page by pressing `Ctrl+Shift+A`. The Add-ons Manager opens. You can browse compatible extensions or install XUL add-ons directly from `.xpi` files downloaded elsewhere. Pale Moon handles the installation smoothly.

Getting the Most From XUL Extensions

Not all old Firefox extensions work flawlessly on Pale Moon 34.1.0, but compatibility is solid for most classic add-ons. Check community forums before installing anything obscure. The Pale Moon user base is helpful about listing which extensions work best.

Restart your browser after enabling XUL extensions or installing new add-ons. Changes take effect immediately in most cases, but a fresh start ensures everything loads correctly.

If you miss the era when Firefox extensions had real power and flexibility, Pale Moon is your answer. Switch today and unlock years of abandoned but functional add-ons.