bookmarklet functionality missing in Firefox Android?

I am trying out bookmarklet functionality on a mobile platform (Android 10).

The bookmarklet is named test and points to the code

javascript:alert('boo')

How I test:

• Save the bookmarklet as described above to the bookmarks folder;
• Go to some random website;
• In the address bar, start typing test;
• The browser will recognize the bookmark and offer it in a menu;
• Click it.

Results:

• In Brave for Android (Chrome-based) the alert window appears as expected;
• in Firefox for Android absolutely nothing happens.

Question: Is this intentional on Mozilla's part and/or expected or am I missing something?

It turns out bookmarklets do indeed fail to work on the latest Android Firefox. This was pointed out on the Mozilla support forum after I asked, with a link to the relevant github issue.