about:preferences Change Block List contains an occurrence of "Firefox"
This is a spinoff from #27905 (moved). There is an occurrence of Firefox
within the about:preferences Change Block List
"dialog" which was fixed in Firefox 61 to pull the product name from brandShortName
. Since it will not be easy to backport the fix to ESR60, we will pick this up with ESR68 (see https://hg.mozilla.org/mozilla-central/rev/8ebf84e9825d).