1360257 - Cannot inspect a specific element via Inspect Element if it is used for the first time on a fresh profile

Status: RESOLVED DUPLICATE of bug 1373994

(DevTools :: Inspector, defect, P3)

Description

[Emil Ghitta, QA [:emilghitta]]

[Affected versions]:
Firefox 54.0b2 (Build Id:20170424145525)

[Unaffected versions]:
Firefox 55.0a1 (Build Id:20170427030231)
Firefox 53.0 (Build Id:20170413192749)

[Affected platforms]:
Windows 10 64bit
Mac 10.11.6
Ubuntu 14.04 64bit

[Steps to reproduce]:
1.Launch Firefox with a clean profile.
2.Access the https://www.mozilla.org/en-US/ website.
3.Right Click anywhere.
4.Click Inspect Element.
5.Try to pick a specific element from the page (ex. Stand Up For Encryption).


[Expected result]:
The Stand up For Encryption can be inspected.

[Actual result]:
The Stand up for Encryption element cannot be inspected.

[Regression range]:
This is already fixed in latest Nightly.

[Additional information]:
Please note that this issue is reproducible only by using a clean profile and when using the inspector for the first time.

This issue is not reproducible after restarting the inspector or after refreshing the webpage.

Comment 1

[Emil Ghitta, QA [:emilghitta]]

Please access the following link in order to see more details about this issue: https://drive.google.com/open?id=0B94iuIVMr-TEQ3Q2RXZjaVRvYnc

Comment 2

[Mike Conley (:mconley) (:⚙️) (PTO: May 24 - June 2nd)]

Hey emilghitta, do we know which bug / patch fixed this issue on Nightly?

Comment 3

[Emil Ghitta, QA [:emilghitta]]

Hi Mike ! 

I couldn't find the bug that fixed this issue on Nightly because this is very time consuming for me ( I have tested with old Nightly from 2014 and with the latest Nightly and both of them turned out to be good builds).

I have managed to reproduce this issue on Aurroa and managed to find this pushlog using mozregression:

pushlog_url: https://hg.mozilla.org/releases/mozilla-aurora/pushloghtml?fromchange=d56c36ff0b8bc34183f056866de81a6a61c782ec&tochange=189ed7b2306fcf0a7683df6959b78fdb94bb34e7

Looking at the pushlog, i suspect bug 1349275 caused this issue to appear in Aurora.

Let me know if this helps!

Comment 4

[Mike Conley (:mconley) (:⚙️) (PTO: May 24 - June 2nd)]

Got a sec to look at this possible regressino from bug 1349275, zer0?

Comment 5

[Matteo Ferretti [:zer0] [:matteo]]

DevTools bug triage (filter on CLIMBING SHOES)

Comment 6

[Matteo Ferretti [:zer0] [:matteo]]

I wasn't able to reproduce at first attempt, I'll test deeper once I've complete the bugs I'm working on for the CSS Grid.

Comment 7

[Matteo Ferretti [:zer0] [:matteo]]

I believe this is a duplicate of bug 1373994, that is fixed in 55.

Feel free to reopen if that is not the case!