I found a difference between the DOM sizes in Firefox and Chrome. In Chrome, the virtual list for the messages only contains the messages that are on the screen. In Firefox, the virtual list contains all messages that were loaded. In my case, `.c-virtual_list__scroll_container` is currently around 20000px high but contains 8 child nodes in Chrome and 191 child nodes in Firefox.
Bug 1646410 Comment 4 Edit History
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I found a difference between the DOM sizes in Firefox and Chrome. In Chrome, the virtual list for the messages only contains the messages that are on the screen. In Firefox, the virtual list contains all messages that were loaded. In my case, `.c-virtual_list__scroll_container` is currently around 20000px high in both browsers, but contains 8 child nodes in Chrome and 191 child nodes in Firefox.