Atlas › 01 Agent Skills for Browser Automation › WebDriver BiDi Protocol Overview☰ Read as one page
WebDriver BiDi Protocol Overview
15.1What It IsWebDriver BiDi (Bidirectional) is a W3C standard for browser automation. It combines: - The standardization of WebDriver (W3C…15.2Message FormatAll communication is JSON over WebSocket.15.3Core ModulesManages the connection between client and browser.15.4Sessions15.5Key ConceptsA "browsing context" is a tab or iframe. Each has a unique ID.15.6Browser Support (2026)15.7A Worked Example: The BiDi Proxy Pattern (Vibium)The cleanest illustration of building on BiDi is Vibium (see the case study in Competitive Landscape): its clicker binary is a BiDi proxy…15.8Interview Talking Point"WebDriver BiDi is the W3C successor to both classic WebDriver and CDP. It uses WebSocket for bidirectional JSON messaging — the client can…