Does the query come from a browser - how to check it?

The article 'Forbidden Request Headers' by MacArthur explores the limitations associated with HTTP request headers that can be used in web applications. The author explains that certain headers are reserved for the browser or server itself, which can lead to errors when trying to modify them. A significant point discussed in the article is the nature of security tasks and the CORS (Cross-Origin Resource Sharing) policy that establishes which headers can be shared in cross-origin requests. It also includes examples of headers considered forbidden, such as 'Host' and 'User-Agent'. Notably, understanding these restrictions can greatly enhance the web application development process and contribute to better security for user data. In the context of application development, flexibility in using HTTP headers is crucial for full functionality and interaction with various APIs.