(to be clear I don't know that just making it resizable is sufficient to fix the issue - it's difficult for me to be sure because I can't repro in Firefox and nor could my fellow triage person. If you're reproducing + fixing then great; if you can't reliably reproduce we may need to investigate further - happy to help as needed with that!)
Bug 1924047 Comment 4 Edit History
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(to be clear I don't know that just making it resizable is sufficient to fix the issue - it's difficult for me to be sure because I can't repro in Firefox and nor could my fellow triage person. If you're reproducing + fixing then great; if you can't reliably reproduce either we may need to investigate further - happy to help as needed with that!)