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when i type using uppercase letters it automatically switches them back to lower case letters (in a web address for example )

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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.

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.

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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.

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Is this happening on other input boxes also?

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Which part of the address is changed? The path and file name should support mixed case, even if the server name does not.