>>> My Info: Win7_64, Nightly 49, 32bit, ID 20160526082509 This is very hard to reproduce, but sometimes it happens by itself >>> STR_1: 1. Open new window, open tabs http://example.org/#i for i=0..9, - 10 tabs total. Close them 2. Type "example domain 1" in urlbar 3. Press Backspace to delete "1" 4. Type "1" 5. Go to Step 3. AR: Sometimes suggestions twitch to the top when panel compresses (you can see it on screencasts) ER: First suggestion shouldn't twitch for sure Note: Yes, unfortunately there're no better steps, but this regularly happens. It would be nice if somebody found better steps of found a duplicate, or at least confirmed that it happens. I noticed that it happens the first time per session I (accidentally) do something similar to STR_1 with a given pattern (in STR_1 pattern is "example domain 1") that reduces number of matches. When I try it again with the same input, the bug will most likely not happen.