about:support and about:third-party would be a start (if you can load them!) If that's not possible in Firefox 100, maybe the same from Firefox 99 can help.
Bug 1769702 Comment 2 Edit History
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```about:support``` and ```about:third-party``` would be a start (if you can load them!) If that's not possible in Firefox 100, maybe the same from Firefox 99 can help.