Concurrent Browser MCP

Instructions

Implementation Reference

• src/tools.ts:512-513 (handler)

  Handler case in executeTools method that handles the browser_close_instance tool by calling BrowserManager.closeInstance

  case 'browser_close_instance':
    return await this.browserManager.closeInstance(args.instanceId);

• src/tools.ts:69-82 (registration)

  Tool registration in getTools() method, defining name, description, and input schema

  {
    name: 'browser_close_instance',
    description: 'Close the specified browser instance',
    inputSchema: {
      type: 'object',
      properties: {
        instanceId: {
          type: 'string',
          description: 'Instance ID'
        }
      },
      required: ['instanceId']
    }
  },

• src/browser-manager.ts:266-290 (helper)

  Core implementation in BrowserManager that closes the Playwright browser instance and removes it from the instances map

  async closeInstance(instanceId: string): Promise<ToolResult> {
    try {
      const instance = this.instances.get(instanceId);
      if (!instance) {
        return {
          success: false,
          error: `Instance ${instanceId} not found`
        };
      }
  
      await instance.browser.close();
      this.instances.delete(instanceId);
  
      return {
        success: true,
        data: { instanceId, closed: true },
        instanceId
      };
    } catch (error) {
      return {
        success: false,
        error: `Failed to close instance: ${error instanceof Error ? error.message : error}`
      };
    }
  }