You should navigate with keyboard and check that the navigation does not get stuck inside this object. If the navigation actually gets stuck, an alternative content should be provided for keyboard users, so that they will not get trapped inside the object.
Elements of type <object>, <applet>, <bgsound>, <embed> are automatically suspect to have a potential keyboard trap.
Users who use assistive tools, such as screen readers or user with motor disabilities will not be able to navigate the page.