>>> My Info: Win7_64, Nightly 52, 32bit, ID 20161001030430 (2016-10-01) STR_1: 1. Open url data:text/html,<iframe src="data:,a"> 2. Open devtools 3. Hover mouse over iframes button, hold left mouse button, hover mouse over the 2nd iframe, release left mouse button AR: After bug 1266419 - Step 3 is impossible to perform; have to click 2 (!!!) times to choose iframe ER: Step 3 should switch to iframe "data:,a", just like before bug 1266419. Just like in GoogleChrome This is regression from bug 1266419. Regression range: > https://hg.mozilla.org/integration/fx-team/pushloghtml?fromchange=3a87296fe4145138c2ce15512bb31f76fe869cb4&tochange=42fab251fe111d5f891c9bde0ee1fb6f7f946a50@ Jan Honza Odvarko [:Honza] (PTO: 12/09-01/01): It seems that this is a regresion caused by your change. Please have a look.
This seems like minor annoyance that is not severe enough to track as a regression.
Priority: -- → P3
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