crumbPRIVACY, IN PLAIN ENGLISH
A little less data, too.
Crumb filters Facebook Marketplace listings. Here’s what it uses to do that.
What leaves your browser
When AI filtering is on, Crumb sends your search and listing tile text (which may include the title, price, location, and labels) to Crumb’s backend, hosted on Fly.io. Listing IDs accompany the request so results can be matched to tiles. The backend sends the search and text to TypeSafe for relevance classification; listing IDs aren’t included in that provider request.
Crumb also sends a random installation ID. The server receives your IP address as part of the connection. These support usage limits; they are not Facebook account identifiers. Crumb does not send listing images, Facebook cookies, private messages, or account details as separate fields. Avoid putting sensitive information in searches.
What Crumb stores
Your browser stores settings, cached decisions, animation history, and lifetime filtering counts. The backend stores keyed hashes and scores for up to 30 days, plus hashed usage counters until one day after their minute, day, or month expires. Token counts, cost, and completion status for API requests are retained for 90 days; these receipts contain no search or listing text. It does not save raw searches, listing text, or raw IP addresses in its application database or request logs. Hosting and AI providers process requests under their own policies. Fly volume backups may retain expired database entries for up to five additional days.
If you use your own key
The optional setting under Advanced stores your TypeSafe API key locally in your browser profile. In this mode, classifications go directly to TypeSafe and usage is billed to your TypeSafe account. Your key is not sent to Crumb’s backend.
Your controls
Turn filtering off to stop new classifications and restore hidden listings. Ad removal has its own switch and runs locally. Uninstalling Crumb removes its extension storage from your browser. The extension does not include website analytics.
Website analytics
This website uses Google Analytics to understand visits and interactions. Google may use cookies and process information about pages visited, referring sites, browser and device details, and approximate location. This analytics tag runs on the Crumb website, not inside the extension, and is not sent your Marketplace listing data by the extension. See Google’s privacy policy and Google’s Analytics opt-out tool.
Free usage
Daily and shared service allowances help keep Crumb free. When the allowance is exhausted, new AI filtering pauses. Cached decisions and local ad filtering remain available.
Crumb is an independent project, not affiliated with Meta or Facebook. TypeSafe and Fly.io operate their own services. See TypeSafe and Fly.io’s privacy policy for provider information.