(I'm just) thinking out loud

Navigate to System UI > UI Scripts. Click New. In script  You can use global check box which indicates whether script loads on every page in the system ( Use caution when creating global UI scripts because they can impact performance ) You can also include this js file using script tag in your UI pages

Public report means anyone on the internet can access it with a specific URL even though they don't have a ServiceNow login Steps for creating a public report 1) Create a new report or select an existing one. 2) Save the report ( It is necessary to save the report before marking it as public ). 3) Publish it, You will find the link in save drop-down menu. 4) Once you publish a report, you will be alerted with a URL that can be used by users across the internet to access the report. https://your.instance.service-now.com/sys_report_display.do?sysparm_report_id=XXXXXXX