1518095 - Swapping between about:newtab and about:debugging kills devTools

Status: NEW

(DevTools :: about:debugging, defect, P3)

Description

[Cristian Fogel [:cfogel]]

Attachment: devTools_aboutDebugging.gif

[Notes]:
- in reply to 
https://bugzilla.mozilla.org/show_bug.cgi?id=1507125#c19

[Affected versions]:
- 65.0b7, 66.0a1(2019-01-03)

[Affected platforms]:
- Win10, Ubuntu16.04, macOS 10.11

[Steps to reproduce]:
1. Launch Firefox, set devtools.aboutdebugging.new-enabled to true in about:config; 
2. Access about:debugging
3. Open the devTools Inspector;
4. Click on the home button, for about:newtab
5. Navigate back and forth between the 2 pages;

[Expected result]:
- the Inspector properly displays content;

[Actual result]:
- the inspector vanishes completely;

[Regression range]:
- checked just for the inspector vanishing, indicates bug 1503529 to be at fault;
 
[Additional notes]:
* while checking regression in-between this and the other linked bug(1507125) the devTools section had one extra buggy state, in which the whole section became blank (not empty); fast swapping between this and other pages causes this issue still(encountered on ffx_64.0);
- trying to inspect an element or reopen the devTools section is not possible until a browser restart;
- the issue appears to manifests when accessing the about:newtab page;

Comment 1

[Cristian Fogel [:cfogel]]

Hey Dão, mind confirming if this is the case?

Comment 2

[Dão Gottwald [:dao]]

(In reply to Cristi Fogel [:cfogel] from comment #1)

Hey Dão, mind confirming if this is the case?

You mean bug 1503529 causing this? No, this doesn't make sense.

Comment 3

[Julian Descottes [:jdescottes]]

Cristi, could you clarify why this was flagged as a regression? This is an issue with a preffed off UI under development, I am not sure it makes sense to track it for release managers.

Comment 4

[Cristian Fogel [:cfogel]]

Fair enough, did not take in consideration this fact.
There where some versions that did not seem to have this exact issue, so I went ahead and checked for it as well.

Clearing the flag.

Comment 5

[Julian Descottes [:jdescottes]]

thanks Cristi!