Build Identifier: https://hg.mozilla.org/integration/mozilla-inbound/rev/c6d230ecf1a5 Mozilla/5.0 (Windows NT 6.1; WOW64; rv:40.0) Gecko/20100101 Firefox/40.0 ID:20150409080331 Bug 936092 landed in m-i, however, After opening the web page in new tab, drag and drop onto the contents area is not working. Drag and drop a file onto <input type=file> is not working. I tested with newly created profile. Reproducible: sometimes Steps To Reproduce: 1. Open e10s window 2. Open any page in new tab ex. about:home, https://developer.mozilla.org/En/Code_snippets 3. Attempt to drag & drop html, jpg, png. xpi file to the content area 4. Attempt to drag & drop a bookmark from Library to the content area Actual Reslts: No thing happens. Expected Results: D&D should be performed successfully like non-e10s * drag & drop a bookmark from Bookmarks toolbar and Sidebar seems OK

Clarification; Step 2 above is two steps - i.e. first open new tab, then visit site. If you open directly in new tab D&D works. Alternative steps; Type in address about:newtab (or any non-remote address) Type in address about:home in same tab (or visit any remote address) Try D&D (fails)

This is WFM on linux and Windows, e10s enabled.

I can still reproduce on ubuntu14.04 and Wndows7 with e10s. https://hg.mozilla.org/mozilla-central/rev/2c9708e6b54d Mozilla/5.0 (Windows NT 6.1; WOW64; rv:40.0) Gecko/20100101 Firefox/40.0 ID:20150413030203 https://hg.mozilla.org/mozilla-central/rev/2c9708e6b54d Mozilla/5.0 (X11; Linux i686; rv:40.0) Gecko/20100101 Firefox/40.0 ID:20150413030203 :smang, did you should follow str in comment#0? Steps To Reproduce: 1. Open e10s window --- (there is about:home tab only) 2. Open any page in new tab --- (enter url and middle+ click reload button etc) ex. about:home, https://developer.mozilla.org/En/Code_snippets 3. Attempt to drag & drop html, jpg, png. xpi file to the content area 4. Attempt to drag & drop a bookmark from Library to the content area

I assume we're somehow missing to creating the drag session in the child process, but why... Anyone who can reproduce this, do you see any related warnings in the terminal when using a debug build?

And yes, I did follow the STR exactly. No luck reproducing.

[Parent 4536] WARNING: No docshells for remote frames!: file c:\builds\ moz2_slave\m-cen-w32-d-000000000000000000\build\src\dom\base\nsFrameLoader.cpp, line 492 [Parent 4536] WARNING: No docshells for remote frames!: file c:\builds\moz2_slave\m-cen-w32-d-000000000000000000\build\src\dom \base\nsFrameLoader.cpp, line 492 [Parent 4536] WARNING: No docshells for remote frames!: file c:\builds\moz2_slave\m-cen-w32-d-000000000000000000\build\src\dom \base\nsFrameLoader.cpp, line 492 [Parent 4536] WARNING: NS_ENSURE_TRUE(mMutable) failed: file c:\builds\moz2_slave\m-cen-w32-d-000000000000000000\build\src\net werk\base\nsSimpleURI.cpp, line 264 [Parent 4536] WARNING: No docshells for remote frames!: file c:\builds\moz2_slave\m-cen-w32-d-000000000000000000\build\src\dom \base\nsFrameLoader.cpp, line 492 [Parent 4536] WARNING: No docshells for remote frames!: file c:\builds\moz2_slave\m-cen-w32-d-000000000000000000\build\src\dom \base\nsFrameLoader.cpp, line 492 [Parent 4536] WARNING: Enabling vsync compositor : file c:\builds\moz2_slave\m-cen-w32-d-000000000000000000\build\src\gfx\layers\ipc/CompositorParent.cpp, line 483 [Parent 4536] WARNING: NS_ENSURE_SUCCESS(rv, rv) failed with result 0x80520012: file c:\builds\moz2_slave\m-cen-w32-d-00000000 0000000000\build\src\netwerk\base\nsFileStreams.cpp, line 205 [Parent 4536] WARNING: NS_ENSURE_SUCCESS(rv, rv) failed with result 0x80520012: file c:\builds\moz2_slave\m-cen-w32-d-00000000 0000000000\build\src\netwerk\base\nsFileStreams.cpp, line 492 [Parent 4536] WARNING: NS_ENSURE_SUCCESS(rv, rv) failed with result 0x80520012: file c:\builds\moz2_slave\m-cen-w32-d-00000000 0000000000\build\src\netwerk\base\nsFileStreams.cpp, line 205 [Parent 4536] WARNING: NS_ENSURE_SUCCESS(rv, rv) failed with result 0x80520012: file c:\builds\moz2_slave\m-cen-w32-d-00000000 0000000000\build\src\netwerk\base\nsFileStreams.cpp, line 492 [Parent 4536] WARNING: No docshells for remote frames!: file c:\builds\moz2_slave\m-cen-w32-d-000000000000000000\build\src\dom \base\nsFrameLoader.cpp, line 492

100% reproducible for me. Of course, I tested with newly created profile.

Can you dnd text from external program to textarea in e10s-FF when this issue happens?

(In reply to Olli Pettay [:smaug] from comment #8) > Can you dnd text from external program to textarea in e10s-FF when this > issue happens? Yes , I can reproduce. STR: 1. Open this page in new tab 2. D&D from a selected text on wordpad.exe to input/textarea on this page. Actual Results: Nothing happens.

I can also reproduce the problem on ubuntu. D&D from selected text on gedit to input/textarea on this page.

I've managed to reproduce the issue once on a newly created profile. After restarting the issue was gone. Investigating

This is similar to the "drop" case.

https://hg.mozilla.org/integration/mozilla-inbound/rev/f3ce723bd0b9 If there are other issues with e10s+dnd, could you file new bugs, thanks (well, assuming the patch fixes your issue, not only the one I managed to reproduce).

WordPress developers say DnD still doesn't work on e10s-enabled Firefox 40. Any ideas? https://core.trac.wordpress.org/ticket/32438

works in debian 9 (stretch testing)

Verified fixed using Windows 7 32 bit. Build identifier: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:42.0) Gecko/20100101 Firefox/42.0 [bugday-20150729]