As an example, load https://mozilla.pettay.fi/moztests/shadow_link.html and try to pick 'in shadow' -link.

I am currently doing some improvement to pick+shadow dom in https://bugzilla.mozilla.org/show_bug.cgi?id=1465873, but it doesn't seem to fix this issue. It seems that the element is correctly selected (breadcrumbs are correct) but the tree is not expanded correctly to reveal it.

This is quite easy to fix by reusing the last patches from Bug 1465873 and allowing the markup view to navigate from shadowRoot to the host element using what I currently call parentOrHost(). Maybe this method should be renamed as markupViewParent() to indicate this returns the parent node "as represented in the markup view". This bug will be a good time to review our current usage of parentNode() and see where it makes sense to use the new method instead. https://searchfox.org/mozilla-central/search?q=.parentNode()&case=true&regexp=false&path=devtools%2Fclient%2Finspector

Comment on attachment 8988930 [details] Bug 1472142 - part3: Add mochitest to test picking an element in nested shadow dom; https://reviewboard.mozilla.org/r/254052/#review261370 I haven't reviewed these closely yet, but I think this test is a superset of part 2. Unless if part 2 covers a distinct use case I'd rather drop it and just use this one (faster test runs, less intermittents, etc).

(In reply to Brian Grinstead [:bgrins] from comment #14) > Comment on attachment 8988930 [details] > Bug 1472142 - part3: Add mochitest to test picking an element in nested > shadow dom; > > https://reviewboard.mozilla.org/r/254052/#review261370 > > I haven't reviewed these closely yet, but I think this test is a superset of > part 2. Unless if part 2 covers a distinct use case I'd rather drop it and > just use this one (faster test runs, less intermittents, etc). Good point, folding. Try https://treeherder.mozilla.org/#/jobs?repo=try&revision=47ea11533da7e5c2eb1b5a2b8a8ffc26ac86d030

Comment on attachment 8988757 [details] Bug 1472142 - part2: Add mochitest to test picking an element in shadow dom; https://reviewboard.mozilla.org/r/253954/#review262268

Comment on attachment 8988756 [details] Bug 1472142 - part1: Support picking elements in shadow dom; https://reviewboard.mozilla.org/r/253952/#review262384

Pushed by jdescottes@mozilla.com: https://hg.mozilla.org/integration/autoland/rev/4c0f51f57b2f part1: Support picking elements in shadow dom;r=bgrins https://hg.mozilla.org/integration/autoland/rev/0c4629d8d2ab part2: Add mochitest to test picking an element in shadow dom;r=bgrins

https://hg.mozilla.org/mozilla-central/rev/4c0f51f57b2f https://hg.mozilla.org/mozilla-central/rev/0c4629d8d2ab

I have reproduced this issue using Firefox 62.0a1 (2018.06.29) on Windows 10 x64. I can confirm this issue is fixed, I verified using Firefox 63.0b3 on Ubuntu 16.04 x64, Windows 10 x64 and Mac OS X 10.13.