Privacy Policy

In short

Filtrum is a browser extension that hides the parts of web pages you have chosen not to see. It has no accounts, no analytics, no advertising and no tracking. To decide what to hide, it sends the text and images it is checking to a classifier, with a random ID used only for usage limits. Nothing else leaves your browser.

What stays in your browser

• Your settings: which categories to hide, and the people and topics you have listed. These are kept in Chrome’s extension storage and synced by Chrome between your own browsers if you have Chrome sync on. We never receive them.
• A random install ID, made when Filtrum is installed. It is not linked to your name, email or Google account.

What is sent, and why

• Page text and images. As you scroll, Filtrum sends the text or image it is checking, together with the names of any people you have listed, to be classified. The answer says which categories it matches; your extension then decides, on your device, whether to hide it.
• Screenshots of settings pages. On a site’s settings page with a switch that turns adult-content filtering off (for example a site’s mature-content or SafeSearch setting), Filtrum takes a screenshot of the visible tab and sends it to the same classifier, to find which rows to cover.
• The install ID and your IP address. Each request carries the install ID. Our server uses it and your IP address only to apply daily usage limits, so that one installation cannot use up everyone else’s share.

Requests go to our server at filtrum.kairoslifemap.com, which forwards them to TypeSafe (typesafe.ai), the company that runs the classifier, and returns its answer. Our server does not store the text, images or screenshots. For the usage limits it keeps a count of requests per day for each install ID and for each IP address, with IP addresses stored only in hashed form. TypeSafe receives the content in order to classify it; its handling is governed by TypeSafe’s own terms.

Filtrum does not send your browsing history or the addresses of the pages you visit. Images are sent as image data, not as links.

What we do not do

• We do not sell, rent or share your information with anyone other than as described above.
• We do not use it for advertising, profiling or to determine creditworthiness or lending.
• We do not collect analytics, usage statistics or crash reports.

Your choices

You can turn filtering off in Filtrum’s popup, which stops page text and images being sent. The settings-page screenshots described above continue while Filtrum is installed. Uninstalling Filtrum stops everything and removes its settings and install ID from your browser. The daily request counts on our server hold no content and are not linked to your identity.

Changes to this policy

If Filtrum starts sending or storing anything new, this page will be updated before that version is released, and the date above will change.