Application mobility is a subcategory of service mobility, being defined as the process of migrating applications between different hosts during application execution. In this paper we present a decentralized architecture for web-based adaptive application mobility, using the WebRTC framework. To the best of our knowledge, our proposal is the first of its kind within the area. It is our purpose to show the feasibility of a decentralized system for web-based adaptive application mobility, and present WebRTC as a strong facilitator of that idea.