Whoa, interesting. Same URL in both browsers, right? Try clearing Firefox's cache?
In your screenshot, looks like you're highlighting on an Add-ons page. Try clicking "Kanban board" above?
(Testing a few of my project boards in Firefox (version 80) and they're loading fine.)
For JSM June Challenge #2, share how your non-technical teams like HR, legal, marketing, finance, and beyond started using Jira Service Management! Tell us: Did they ask to start using it or...
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