when i type using uppercase letters it automatically switches them back to lower case letters (in a web address for example )
when ever i try to type using capital letters(uppercase) it automatically switches the letters to lowercase letters for example when typing the web address in the address bar.
The transformation of Upper Case to Lower case is called as URL normalization which is the process by which URLs are modified and standardized in a consistent manner. According to Wikipedia it reduces indexing of duplicate pages,also The scheme and host components of the URL are case-insensitive. Read more from here : URL Normalization
That's why it is converting upper case into lower case.
Is this happening on other input boxes also?
Which part of the address is changed? The path and file name should support mixed case, even if the server name does not.