STR: 1. Open a bunch of tabs 2. Menu -> Show Windows What should happen: - The tab switcher appears, with my current page focused. What actually happens: - The tab switcher appears, but often (not always!) focuses the most recently opened page, instead of the page I'm looking at. The inconsistency makes it impossible to develop muscle memory for closing tabs. The lack of undo (Bug 1176894) means that I regularly (3+ times a week) end up losing tabs to accidental closing

QAWANTED: I think this is a duplicate bug. Could you investigate which bug it's a dup of?

I cannot reproduce this bug on Aries. I had over 10 websites opened, and each time I tap on ellipsis icon > Show Window, it always shows my current window. Bug repro rate: 0 out of ~25. On Flame it constantly LMK's due to low memory. See bug 1172167. Reporter could you provide a more detailed STR? A video demonstrating the bug would be helpful. Leaving QAWanted tag for others to attempt. Device: Aries (RC4 > OTA'ed) BuildID: 20150701171852 Gaia: 26b853b7cf94ea9e9ac6f20c55db462bd213a959 Gecko: ca0fd580a9ce Gonk: 2916e2368074b5383c80bf5a0fba3fc83ba310bd Version: 42.0a1 (2.5 Master) Firmware Version: D5803_23.1.A.1.28_NCB.ftf User Agent: Mozilla/5.0 (Mobile; rv:42.0) Gecko/42.0 Firefox/42.0

I don't have consistent STRs, but once it occurs, I tend to get it several times in a row. I'll try to capture a video the next time it happens.

I was not able to reproduce this issue on the latest Aries spark build. Actual Results: The task switcher was correctly centered. Environmental Variables: Device: Aries 2.5 BuildID: 20150731163020 Gaia: 8502d07cd7e68da79303471acf64eea48b3dce24 Gecko: ca53d4297f02 Gonk: 2916e2368074b5383c80bf5a0fba3fc83ba310bd Version: 42.0a1 (2.5) Firmware Version: D5803_23.1.A.1.28_NCB.ftf User Agent: Mozilla/5.0 (Mobile; rv:42.0) Gecko/42.0 Firefox/42.0

I was able to reproduce this issue. It seems to reproduce, as Comment 3 describes, in consecutive groupings. I used an Aries device and a Flame device in light of bug 1172167 (Comment 2). Repro Steps: 1. Open 8-10 separate windows in Browser app. 2. Once 8-10 tabs are open, side gesture (left or right) to another window 3. Allow each window to load before the next swipe 4. At the final window, select "..." then "Show windows" NOTE: When side gesturing left or right, start from one side and go all the way to the oldest/newest window as the video illustrates. Actual Result: The user is taken to the incorrect browser window after side swiping to older windows then selecting "Show windows" in Browser app. Repro frequency: About 5/25 Video: http://youtu.be/UUuMGt4hXNE Environmental Variables: Device: Aries 2.5 Build ID: 20150902124951 Gaia: e2fab8f6ac345ecde10a1350e699be9ceb6987d6 Gecko: 1b687fcb5213153855c7ac0f8392ce0a4a7e3382 Gonk: 2916e2368074b5383c80bf5a0fba3fc83ba310bd Version: 43.0a1 (Master) Firmware Version: D5803_23.1.A.1.28_NCB.ftf User Agent: Mozilla/5.0 (Mobile; rv:43.0) Gecko/43.0 Firefox/43.0 I did not find a duplicate of this bug (comment 1)...

Let's get branch checks of this issue using the steps from comment 5.

Branch Check Issue DOES occur in Flame 2.5 (512 MB memory, a maximum of 4 windows can be opened at a time). Repro Attempts: 4/5 Device: Flame 2.5 Build ID: 20150902045425 Gaia: e2fab8f6ac345ecde10a1350e699be9ceb6987d6 Gecko: 1b687fcb5213153855c7ac0f8392ce0a4a7e3382 Version: 43.0a1 (Master) Firmware Version: v18D User Agent: Mozilla/5.0 (Mobile; rv:43.0) Gecko/43.0 Firefox/43.0 ----------------------------------------------------- Issue DOES NOT occur in Flame 2.2 (512 MB memory). Repro Attempts: 0/15 Device: Flame 2.2 BuildID: 20150901092824 Gaia: 335cd8e79c20f8d8e93a6efc9b97cc0ec17b5a46 Gecko: c03e2bc6a3a4 Version: 37.0 (2.2) Firmware Version: v18D User Agent: Mozilla/5.0 (Mobile; rv:37.0) Gecko/37.0 Firefox/37.0

Let's get a regression window on this then.

B2G Inbound Regression Window Last Working Device: Flame 2.5 BuildID: 20150612172044 Gaia: 6c41f358c0174bc6702df979232824459ccc2f41 Gecko: aa109a7d3c9a Version: 41.0a1 (2.5) Firmware Version: v18D User Agent: Mozilla/5.0 (Mobile; rv:41.0) Gecko/41.0 Firefox/41.0 First Broken Device: Flame 2.5 BuildID: 20150612174339 Gaia: 1bf2da102560481748ff3f6202fbed5c4daa5832 Gecko: 918f5d2e3e5f Version: 41.0a1 (2.5) Firmware Version: v18D User Agent: Mozilla/5.0 (Mobile; rv:41.0) Gecko/41.0 Firefox/41.0 Last Working Gaia and First Broken Gecko Issue DOES NOT occur here. Gaia: 6c41f358c0174bc6702df979232824459ccc2f41 Gecko: 918f5d2e3e5f Last Working Gecko and First Broken Gaia Issue DOES occur here. Gaia: 1bf2da102560481748ff3f6202fbed5c4daa5832 Gecko: aa109a7d3c9a B2G Inbound Pushlog: https://github.com/mozilla-b2g/gaia/compare/6c41f358c0174bc6702df979232824459ccc2f41...1bf2da102560481748ff3f6202fbed5c4daa5832 Possible Cause: Bug 1161229 - Use CSS Scroll Snapping in card view.

Sam this issue seems to have been caused by the changes for bug 1161229. Can you please take a look?

(In reply to Jayme Mercado [:JMercado] from comment #10) > Sam this issue seems to have been caused by the changes for bug 1161229. > Can you please take a look? Ok yeah I see what's going on - I was confused at first. So the STR for this should be: 1. Open multiple browser or app windows 2. Holdhome to show task manager 3. Select any but the first card in the task manager to open that app/window 4. Use edge swipe to go back to the first app you opened 5. Holdhome to show the task manager again Expect result: The first app's in the task switcher card should be centered in the viewport Actual result: The app selected from step 3 is centered. I see what's going on here, I get a patch in.

Comment on attachment 8657294 [details] [gaia] sfoster:task-manager-centering-bug-1176895 > mozilla-b2g:master Fixes a logic error - as we dont reset scrollLeft (and shouldnt rely on that) by only centering when stackIndex (StackManager position) was > 0, we could end up with the wrong app centered. Added a unit test for this case.

Comment on attachment 8657294 [details] [gaia] sfoster:task-manager-centering-bug-1176895 > mozilla-b2g:master :+1: r=me with nits

I broke out those tests as suggested, on master: https://github.com/mozilla-b2g/gaia/commit/70b68a1776e273e9c06f66cae6f85d09460271f8