In case it helps, see bug 2000860 comment 10 I just posted (the Refresh Firefox option is still available in the Firefox uninstaller and works, even when using the selectable profile management system in Firefox Beta 148 on Windows 11 and Refresh Firefox is missing from about:support.)
Bug 2013715 Comment 7 Edit History
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In case it helps, see bug 2000860 comment 10 I just posted (the Refresh Firefox option is still available in the Firefox uninstaller and works, even though I'm using the selectable profile management system in Firefox Beta 148 on Windows 11 and Refresh Firefox is missing from about:support.)