Open Bug 1327427 Opened 6 years ago Updated 6 months ago

Sound indicator prevents dragging tab if it disappears between mousedown and mousemove


(Firefox :: Tabbed Browser, defect)





(Reporter: arni2033, Unassigned)


>>>   My Info:   Win7_64, Nightly 49, 32bit, ID 20160526082509
1. Open url
2. Hover mouse over the sound indicator in the tab, hold left mouse button
3. Press K key to pause the video
4. Wait until sound indicator disappears
5. Move mouse by 50px to the left

1. Open url [1] in a new tab     [Tab_1]
2. Click button "Open new tab"   [Tab_2 opens]
3. Go back to the Tab_1
4. Click "Play" button. Click "Pause after" button.
5. In less than 3 seconds, hover mouse over the sound indicator in Tab_2, hold left mouse button
6. Wait until sound indicator disappears
7. Move mouse by 50px to the left

AR:  No visible action
ER:  Tab should follow mouse pointer

Note:  Remember, tabs remove sound indicator randomly. STR_1 & STR_2 are just an emulation

> [1] data:text/html,<script>url='data:text/html,\<body onload=\'V=document.querySelector("video");V.volume=0.1\'>\<video controls src=" different kind of browser.webm">'</script><button onclick=",'child');window.focus()">Open new tab</button><br><button onclick="">Play</button><br><button onclick="setTimeout(function(){W.V.pause()},I.value)">Pause after</button><input id="I" value="3000">milliseconds<br>
No longer blocks: 1277113
User Agent:  Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:53.0) Gecko/20100101 Firefox/53.0

I have tested this issue on Windows 10 x64 with the latest Firefox release (50.1.0) and the latest Nightly (53.0a1-20170104030214) and managed to reproduce it following the steps in STR_1.
Component: Untriaged → Tabbed Browser
Severity: normal → S3
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