HAR file & JavaScript console

To generate HAR file please follow the instructions provided in Atlassian documentation: https://confluence.atlassian.com/kb/generating-har-files-and-analyzing-web-requests-720420612.html

To open and check the browser's javascript console log, please follow the provided instruction: https://webmasters.stackexchange.com/questions/8525/how-do-i-open-the-javascript-console-in-different-browsers