Crumb door Ryan Curran

Cookie consent banners are the worst thing about the modern web. Every site, every time — the same pop-up asking you to "manage preferences" or "reject all," most of them designed to make rejecting harder than accepting.

Crumb makes them go away.

It hides cookie banners with a stylesheet built from Fanboy's Cookie Monster list plus a small curated overlay for sites that need extra coverage. The browser's built-in declarativeNetRequest engine blocks the consent-management scripts at the network layer.

For the rare site where there's no banner to hide — Google's and Yahoo's cookie consent walls are a full standalone page, not an overlay over real content — Crumb can optionally click "Reject All" for you. This is off by default, and limited to that small, known list of pages; turn it on with a single checkbox in the popup.

That's the whole extension.

What makes Crumb different:

• Zero telemetry. No analytics, no crash reporting, no usage metrics. Nothing leaves your browser, ever.

• No remote calls. The block list is bundled with the extension at build time and never updates over the network. New rules ship as new versions through AMO, like every other extension you trust.

• No auto-clicking by default. Hiding is the default everywhere. The one opt-in exception — standalone consent-wall pages — only ever clicks "Reject," never "Accept."

• Open source under MIT. Every filter and every line of code is on GitHub. The build pipeline that turns filter lists into the runtime is plain JavaScript — no minification, no obfuscation.

• Minimal. The runtime is event-driven — no timers, no polling. One opt-in checkbox is the only setting that exists.

Why "Crumb"?

Because we don't give one about cookies.

Credits

Crumb is a Firefox port of the wonderful Hush by Joel Arvidsson, which works on Safari. The filter list is Fanboy's Cookie Monster by Ryan Brown, used under CC BY 3.0.

Source: https://github.com/rcurranmoz/crumb