Blog | Gasoline Agentic Devtools

Gasoline v5.4.1 Released

Jan 18, 2026

Brenn Hill

What’s New in v5.4.1

Quick patch release fixing element selection and interaction issues in v5.4.0.

Fixes

Fixed semantic selector matching on shadow DOM elements
Resolved toast visibility on pages with z-index layering
Improved form field detection for hidden labels
Better handling of contenteditable elements

Upgrade

npm install -g gasoline-mcp@5.4.1

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v5.4.1 Release

Gasoline v5.4.3 Released

Jan 18, 2026

Brenn Hill

What’s New in v5.4.3

Gasoline v5.4.3 includes additional bug fixes and stability improvements following v5.4.1.

Fixes

Fixed click handling on elements inside iframes
Resolved memory leak in toast notification cleanup
Improved robustness of element scrolling
Better error recovery when pages reload during interaction

Performance

Reduced CPU usage during idle observation
Optimized selector matching algorithm

Upgrade

npm install -g gasoline-mcp@5.4.3

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v5.4.3 Release

Gasoline v5.4.0 Released

Jan 17, 2026

Brenn Hill

What’s New in v5.4.0

Gasoline v5.4.0 redesigns the interaction model for better AI agent integration and reliability.

Features

Improved interact() Tool — More reliable element selection and action execution
Visual Feedback — Toast notifications for AI-triggered interactions
Better Form Handling — Enhanced form filling with validation awareness
Robust Navigation — Improved page load detection and state tracking

Improvements

More deterministic element targeting with semantic selectors
Better handling of dynamic content and SPA navigation
Improved timeout handling for slow operations
Enhanced compatibility with modern web frameworks

Fixes

Fixed element visibility detection on overlaid modals
Resolved form submission race conditions
Improved navigation state after dialog close

Upgrade

npm install -g gasoline-mcp@5.4.0

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v5.4.0 Release

Gasoline v5.3.0 Released

Jan 13, 2026

Brenn Hill

What’s New in v5.3.0

Gasoline v5.3.0 adds comprehensive WebSocket inspection and significant performance improvements.

Features

WebSocket Capture — Full message tracking for WebSocket connections
Real-time Message Streaming — Monitor WebSocket traffic as it happens
Binary Message Support — Handle binary WebSocket frames alongside text
Connection State Tracking — Visualize connection open/close lifecycle

Performance

40% reduction in memory overhead
Optimized log buffer management
Faster message serialization

Fixes

Fixed observer timeout on high message volume
Improved handling of concurrent connections
Better cleanup of abandoned resources

Upgrade

npm install -g gasoline-mcp@5.3.0

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v5.3.0 Release

Gasoline v5.2.5 Released

Jan 12, 2026

Brenn Hill

What’s New in v5.2.5

Gasoline v5.2.5 focuses on stability and fixes edge cases discovered in production use.

Improvements

Better handling of rapid tab switching
Improved memory cleanup on long sessions
Fixed race conditions in message queue
Enhanced resilience to malformed responses

Fixes

Resolved observer disconnection on network errors
Fixed log queue overflow handling
Improved error message formatting for edge cases

Upgrade

npm install -g gasoline-mcp@5.2.5

Full Changelog

v5.2.5 Release