![No 'Access-Control-Allow-Origin' header is present on the requested resource (Working in Postman but not in JavaScript) - Forum | Refinitiv Developer Community No 'Access-Control-Allow-Origin' header is present on the requested resource (Working in Postman but not in JavaScript) - Forum | Refinitiv Developer Community](https://community.developers.refinitiv.com/storage/attachments/12490-output-error-firefox-postman.png)
No 'Access-Control-Allow-Origin' header is present on the requested resource (Working in Postman but not in JavaScript) - Forum | Refinitiv Developer Community
![Zoom SDK ver 2.9.5 with credentialless headers does not work on firefox - Web - Zoom Developer Forum Zoom SDK ver 2.9.5 with credentialless headers does not work on firefox - Web - Zoom Developer Forum](https://global.discourse-cdn.com/business6/uploads/zoomdeveloper/original/3X/d/6/d63b35b3d1e9e717b9d2c64bc8c4db368df238ce.png)
Zoom SDK ver 2.9.5 with credentialless headers does not work on firefox - Web - Zoom Developer Forum
![403 response to a CORS preflight request from an angular app to a spring security REST API caused by a Access-Control-Request-Headers mismatch | Coding Notes 403 response to a CORS preflight request from an angular app to a spring security REST API caused by a Access-Control-Request-Headers mismatch | Coding Notes](https://nicolas.riousset.com/wp-content/uploads/2021/03/2021-03-18_23h24_19.png)