Topics API.

A Privacy Sandbox API in Chrome and Android that derives a small set of high-level interest topics from the user's recent browsing locally on the device, exposing them to participating sites instead of cross-site tracking identifiers. 它属于网络安全的 隐私与数据保护 分类。

A Privacy Sandbox API in Chrome and Android that derives a small set of high-level interest topics from the user's recent browsing locally on the device, exposing them to participating sites instead of cross-site tracking identifiers.

The Topics API is a Privacy Sandbox component that replaces third-party-cookie-based behavioural interest signals with a locally derived, low-resolution interest taxonomy. Chrome (and Android) infers, on device, up to a few coarse topics — drawn from a public taxonomy of a few hundred categories such as 'Sports/Soccer' or 'Travel/Hotels & Accommodations' — based on the top-level hostnames the user has visited over the past few weeks. When a caller invokes `document.browsingTopics()`, the browser returns a small random sample of recent topics (with random noise to limit linkability), but only for hostnames that were observed by that caller in the past. This means a fingerprinter sitting on a single site cannot ask for topics on behalf of unrelated callers, and a site cannot use the topics as a stable identifier. Critics — Mozilla, Brave, the EFF, several DPAs — have argued the API still reveals more than necessary and effectively endorses behavioural advertising at the browser level. Google launched Topics for general availability in Chrome in 2023 and on Android in 2024; uptake by ad-tech players grew through 2024–2025 in tandem with Privacy Sandbox.

针对 Topics API 的防御通常结合技术控制与运营实践,详见上方完整定义。

常见的别称包括: Browsing Topics API。