v0.4.7

WebExtension builds of FastMCP Browser — the MCP bridge that drives Chrome/Firefox over a loopback WebSocket (33 MCP browser tools).

What's new in v0.4.7

• Steer the model away from click-then-type. browser_click, browser_fill, and browser_fill_form now say in their tool descriptions that an input must not be clicked just to place the caret: browser_fill/browser_fill_form set the value directly, and a click-then-type pair only adds a round-trip in which a stray user click can move the caret and send the text to the wrong field. Same extension build; the change is in the MCP server tool docs.

Install

Unzip an archive and load it unpacked:

• Chromium (fastmcp-browser-extension-chromium.zip) → chrome://extensions → Load unpacked → the chromium folder
• Firefox (fastmcp-browser-extension-firefox.zip) → about:debugging → Load Temporary Add-on → firefox/manifest.json

The Firefox .xpi has manifest.json at the archive root. It is unsigned; standard Firefox release builds require a Mozilla-signed add-on for permanent installation. LibreWolf and Firefox Developer Edition/Nightly may allow unsigned add-ons when signature enforcement is disabled.