I just upgraded from 11.19.0 to 11.20.0 and the Firestore UI's query/filter UI (which pops out as a dialog) is broken. See screenshots below.
[REQUIRED] Environment info
firebase-tools: 11.20.0
Platform: macOS
[REQUIRED] Test case
Install/upgrade to the latest 11.20.0 version:
npm install -g firebase-tools
// or
npm install -g firebase-tools@11.20.0
[REQUIRED] Steps to reproduce
Open up the Firestore UI, select a collection and then click the menu icon (which pops out a dialog to choose conditions/order etc.). This is broken and the dialog is hidden behind the data elements. It looks like this:

[REQUIRED] Expected behavior
Install the previous version:
npm install -g firebase-tools@11.19.0
And view the same UI and it shows the dialog as expected:

[REQUIRED] Actual behavior
See screenshot in "Steps to repro" section.