How does Mozilla Firefox load favicons?

Mozilla Firefox discovers favicons via link tags in the document head and default requests to /favicon.ico. This page lists supported formats and preferred sizes.

Does Mozilla Firefox support SVG favicons?

Support varies by version and platform. Always provide PNG and ICO fallbacks even when shipping SVG.

Why is my favicon not updating in Mozilla Firefox?

Browsers cache favicons aggressively. Hard-refresh, clear cache, or rename the file when testing changes in Mozilla Firefox.

Favicon for Mozilla Firefox

Firefox follows standard HTML link rel icon semantics and falls back to /favicon.

Engine

gecko

Preferred size

32×32

Formats

ICO, PNG, SVG

Supported formats

ICO favicon support
PNG favicon support
SVG favicon support
Preferred tab size: 32×32
Gecko rendering engine

Browser-specific quirks

SVG favicons ignore external CSS—keep SVG self-contained.
Private browsing uses the same favicon cache rules as normal windows.
Favicon requests appear clearly in the Network monitor filtered by img or icon.
Old favicons persist until hard refresh or cache clear.
Windows HiDPI uses 32×32 sources for 16×16 layout pixels.

Generate your Mozilla Firefox Favicon

Drag & drop your image here

PNG, JPG, or WebP. We recommend at least a 260×260px image. All processing happens entirely in your browser.

All browsers

Chrome, Safari, Firefox, Edge

All devices

iOS, Android, PWA

Complete package

ICO, PNG, SVG, manifest

Other browsers

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Guides & articles

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Frequently asked questions

1How does Mozilla Firefox load favicons?: Mozilla Firefox discovers favicons via link tags in the document head and default requests to /favicon.ico. This page lists supported formats and preferred sizes.
2Does Mozilla Firefox support SVG favicons?: Support varies by version and platform. Always provide PNG and ICO fallbacks even when shipping SVG.
3Why is my favicon not updating in Mozilla Firefox?: Browsers cache favicons aggressively. Hard-refresh, clear cache, or rename the file when testing changes in Mozilla Firefox.