In-Browser Agents for Search Assistance
Saber Zerhoudi, Michael Granitzer

TL;DR
This paper introduces a privacy-preserving in-browser AI assistant for search that adapts to user behavior using client-side models, improving search efficiency without transmitting sensitive data.
Contribution
The paper presents a novel hybrid client-side architecture combining probabilistic models and small language models for private, adaptive search assistance.
Findings
Effective personalization of search assistance in three-week user study
Significant improvement in search efficiency observed
Privacy preserved by keeping all processing on the client side
Abstract
A fundamental tension exists between the demand for sophisticated AI assistance in web search and the need for user data privacy. Current centralized models require users to transmit sensitive browsing data to external services, which limits user control. In this paper, we present a browser extension that provides a viable in-browser alternative. We introduce a hybrid architecture that functions entirely on the client side, combining two components: (1) an adaptive probabilistic model that learns a user's behavioral policy from direct feedback, and (2) a Small Language Model (SLM), running in the browser, which is grounded by the probabilistic model to generate context-aware suggestions. To evaluate this approach, we conducted a three-week longitudinal user study with 18 participants. Our results show that this privacy-preserving approach is highly effective at adapting to individual…
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Taxonomy
TopicsPersonal Information Management and User Behavior · Recommender Systems and Techniques · Spam and Phishing Detection
