User Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:53.0) Gecko/20100101 Firefox/53.0 Build ID: 20170509205512 Steps to reproduce: Firefox for Android 55.0a1 (2017-06-01) Open the Awesomescreen. Make sure you have visited a page that result in a redirect, e.g. https://en.wikipedia.org/wiki/ (useful for entering the required Wikipedia article URL directly), enough times that it should appear as a Top Site. Actual results: Pages like https://en.wikipedia.org/wiki/ do not appear in Top Sites since yesterday's Highlights change, even if they are the most popular pages in history, and even if they exist as bookmarks. Expected results: Top Sites should show the most visited pages in the browser's history. Maybe Highlights should show them too/instead, but it doesn't. A temporary workaround is to take a page that exists as a Highlight, bookmark it, and then edit the bookmark accordingly. However, it will stay in Highlights only until it is clicked once or twice.
Resolved in 56.0a1 Nightly as of a couple weeks ago. These pages now appear in Top Sites as "user-ent..." (presumably user entered), and since a few days ago, also work correctly when tapped. Ideally they would show a more accurate name and icon, but this will do. Please close as FIXED.
Based on Paul's comment, this bug will be closed.