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450 Blocked by Windows Parental Controls (Microsoft) The Microsoft extension code indicated when Windows Parental Controls are turned on and are blocking access to the requested webpage. [36] 498 Invalid Token (Esri) Returned by ArcGIS for Server. Code 498 indicates an expired or otherwise invalid token. [37] 499 Token Required (Esri)
Most of Chrome's source code comes from Google's free and open-source software project Chromium, but Chrome is licensed as proprietary freeware. [13] WebKit was the original rendering engine , but Google eventually forked it to create the Blink engine; [ 16 ] all Chrome variants except iOS used Blink as of 2017.