Figma MCP OAuth sign-in does not open in Antigravity IDE on macOS

Hello Support Team,

I’m unable to complete Figma MCP OAuth authorization in the latest version of Antigravity IDE on macOS.

In the Figma plugin’s Accounts tab, I see a field labeled “Paste code” and the instruction “Paste the code shown after you sign in.” However, clicking Restart sign-in does not open a browser or produce any visible response, so I cannot obtain the authorization code.

The Website link in the same plugin window opens my browser normally, so the issue appears to be specific to the sign-in flow.

I have already tried:

Fully quitting and restarting Antigravity IDE.
Signing in to figma.com in my browser before retrying.
Clicking Restart sign-in again.
None of these steps resolved the issue.

Environment:

Operating system: macOS
IDE: Antigravity IDE, latest version
Figma plugin version shown: 2.2.163-agy.82ddeba0
OAuth domain: mcp.figma.com
Requested scope: mcp:connect
Could you please help me restore the sign-in flow, or provide instructions for opening the authorization URL manually?

I can provide a screenshot of the authorization window if needed.

Thank you for your help.