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Basic HTTP authentication is when you supply a username and password in the URL, such as This request sends the credentials in the standard HTTP "Authorization" header.

Browser support for basic authentication is limited.

BrowserHTTP Authentication Support
FirefoxSupported, but Firefox will display a prompt asking you to confirm.
SafariUnsupported. See the Support KB article Setting Basic Authentication in Safari with a Pre-Run Executable for an example of how you can use a pre-run executable to handle this situation.
Internet ExplorerUnsupported

Because browser support for basic HTTP authentication is limited, we recommend either Injecting Cookies to Bypass Authentication Dialogs or Running an AutoIt Script as a Pre-run Executable to Handle Windows Security Authentication Dialogs as better solutions for handling authentication.