The plan to unblock this is to enabled <dialog> for chrome-only code in Firefox 80, the primary reason it's disabled with now is an a11y issue (bug 1200896). However, we can work around this issue for 80 with a JS focus hack.
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The plan to unblock this is to enabled <dialog> for chrome-only code in Firefox 80, the primary reason it's disabled with now is an a11y issue (bug 1200896). However, we can work around this issue for 80 with a JS focus hack. I'll set the bug blocking when it's filed / I find it :)