Act as a chrome extension researcher,research and compile a list of Chrome extensions that explicitly state their exclusive operation in the United States or restrict their usage to US citizens only. Your goal is to identify extensions that cater specifically to the needs and interests of users within the USA. Please focus on extensions that provide unique functionality, services, or content tailored exclusively for US-based individuals or businesses. Ensure that the extensions you select clearly mention their exclusivity to the USA or emphasize their exclusive availability for US citizens in their official descriptions or documentation. Remember to gather relevant information such as the extension's name,URL,installation, purpose, features, and any limitations or requirements tied to its US-focused operation.