Changelog | Cloud Browser API for AI Agents & Web Fetch

Production Agent Workflows

v2026.08

Reusable templates, durable results, and more efficient browser sessions

2026/08/21

Repeatable browser automation at scale

Added Chromium and Moli browser choices when creating sessions. Moli uses the stable SDK/API value light and is optimized for lightweight agent browsing.
Added environment-aware browser task templates with reusable agent instructions.
Enabled recording by default and strengthened cross-region replay and download persistence.
Improved browser efficiency and resource use for larger-scale session workloads.

Agent Access and Faster Startup

v2026.07

Simpler agent onboarding with reusable contexts and warm browser capacity

2026/07/31

Faster paths from prompt to browser

Added agent-specific setup prompts, guided quick starts, and secure Browser CLI sign-in.
Expanded reusable contexts with descriptions, regions, forks, and media storage controls.
Reduced startup waiting through prewarmed capacity and readiness improvements.

Browser CLI for AI Agents

v2026.06

A structured command-line browser interface designed for autonomous agents

2026/06/30

Agent-native browser operations

Introduced Browser CLI with semantic navigation, form, wait, storage, and diagnostic actions.
Added reusable context selection, secure sign-in, and machine-readable JSON output.
Packaged agent guidance, environment checks, and quick-start workflows for reliable first-run setup.

Multi-Region Access and Security

v2026.05

Region-aware SDKs and safer access for distributed browser workloads

2026/05/31

Secure multi-region sessions

Added region discovery and automatic region selection to the JavaScript and Python SDKs.
Introduced integrated sign-in, custom browser images, and configurable session window sizes.
Strengthened download access and stored-session data protection.

Async Sessions and Replay Controls

v2026.04

A non-blocking session lifecycle with richer context and recording controls

2026/04/30

Scalable session lifecycle

Made asynchronous session creation with readiness polling the default SDK workflow.
Added browser context forks and session target discovery.
Introduced explicit recording controls and activity-aware session timeouts.

Extensible Session Runtime

v2026.03

Extensions, downloads, and per-session proxy support arrive across the platform

2026/03/31

More capable browser sessions

Added extension mounting for customized browser workflows.
Introduced session download storage and retrieval APIs.
Added per-session proxy support and aligned the capabilities across the JavaScript and Python SDKs.

Reliable Long-Lived Automation

v2026.02

Keep-alive controls and reliability fixes for durable browser workflows

2026/02/28

Resilient session continuity

Expanded context keep-alive controls for long-running automation.
Fixed finalization and deletion timing issues that could leave stale browser sessions.
Improved diagnostic visibility so failed browser operations can be resolved faster.

Persistent Browser Contexts

v2026.01

Reusable browser identity and user data across multiple sessions

2026/01/31

Durable browser state

Added browser context creation, listing, inspection, and deletion APIs.
Enabled cookies, profiles, and browser state to be reused across sessions.
Added usage limits, conflict handling, and safer deletion for more predictable context management.

Session Reliability Improvements

v2025.12

Faster startup, safer timeouts, and more dependable cleanup

2025/12/31

Reliability across the session lifecycle

Improved browser readiness checks and startup reliability for parallel workloads.
Added more predictable session timeout behavior.
Fixed validation and cleanup edge cases that could leave sessions unavailable or unfinished.

Session History and Resource Insights

v2025.11

A unified operational view of active and completed browser sessions

2025/11/30

Observable session operations

Unified active and historical sessions behind a paginated session interface.
Added historical resource usage, peak memory, and network bandwidth measurements.
Introduced controlled custom browser image selection for specialized workloads.

Flexible Browser Modes

v2025.10

Multiple browser modes for different automation workload requirements

2025/10/31

The right browser mode for each task

Added full-featured and lightweight browser modes for different automation workloads.
Standardized session information and connection details across browser modes.
Improved resource presets so tasks can balance compatibility and efficiency.

Cloud Browser Core

v2025.09

On-demand browser sessions with reliable remote connections

2025/09/30

On-demand browser execution

Introduced the create, inspect, and close lifecycle for cloud browser sessions.
Added remote debugging and live-view connection details once a browser is ready.
Fixed startup and cleanup reliability during repeated session use.