1417807 - Developer Tools doesn't collapse when closing, after trying to use Inspector while alert is shown while page load

Status: NEW

(DevTools :: Inspector, defect, P3)

Description

[Tooru Fujisawa [:arai]]

Attachment: HTML that opens alert while page load

Steps to Reproduce:
  1. Run Nightly 59.0a1 (2017-11-15) (64-bit) with clean profile on macOS
  2. open the attached HTML
  3. open Inspector
  4. close Developer Tools with "x" button

Actual result:
  Inspector is blank in step 3
  Developer Tools doesn't collapse, but the entire area becomes white

Expected result:
  Some hint is shown in step 3 (like, "Inspector doesn't work while loading page")
  Developer Tools collapses in step 4

the attached HTML opens alert in script in body, that blocks page load.
it would be the reason why Inspector doesn't work.  the fact that Inspector doesn't work is not an issue here, I think.

Comment 1

[Tooru Fujisawa [:arai]]

sorry, I meant "minor"

Comment 2

[Tooru Fujisawa [:arai]]

everything starts working when I close the alert and page load finishes