1299499 - Firefox becomes unresponsive if accessing non-remote pages while the RDM is enabled

Status: VERIFIED FIXED

(DevTools :: Responsive Design Mode, defect, P1)

Description

[Mihai Boldan, QA [:mboldan]]

[Affected versions]:
- Firefox 51.0a1 (2016-08-31)
 
[Affected platforms]:
- Windows 10x64, Mac OS X 10.10.5, Ubuntu 16.04x64

[Steps to reproduce]:
1. Launch Firefox.
2. From about:config, enable the devtools.responsive.html.enabled pref.
3. Enable RDM.
4. Open non-remote(Eg. about:config) page the opened tab.
5. Select another tab.
6. Click on the previous tab.

[Expected result]:
- Firefox works correctly.

[Actual result]:
- Firefox becomes unresponsive and in the Browser Console, the Error: Assertion failuretabbrowser.xml:3545:23 is thrown.

[Regression range]:
- I will search for regression ASAP.

[Additional notes]:
- Also, after performing step 4 from STR, the RDM tool is displayed as being enabled in the Developer menu.

Comment 1

[Alice0775 White]

Regression window:
https://hg.mozilla.org/integration/fx-team/pushloghtml?fromchange=6de5b59dbcf95bb561d3c60f63743311f3f5d653&tochange=59bc5cd1caa619e2be168d5fa67803f9e96c4309

Triggered by: Bug 1240900

Comment 2

[Gerry Chang [:gchang]]

Hi :jryans,
Can you help take a look at this bug?

Comment 3

[J. Ryan Stinnett [:jryans] (Use needinfo, replies may be slow)]

(In reply to Gerry Chang [:gchang] from comment #2)
> Hi :jryans,
> Can you help take a look at this bug?

Yes, we'll get to this as part of our prioritized bug list for this new feature.  I'll remove regression keyword since it confuses tracking for a feature that's not yet enabled.

Is there a specific reason you're calling out this bug, or just because it was marked as a regression?

Comment 4

[J. Ryan Stinnett [:jryans] (Use needinfo, replies may be slow)]

This should be fixed by bug 1296736.

Comment 5

[Mihai Boldan, QA [:mboldan]]

The issue is no longer reproducible on Firefox 52.0a1 (2016-10-23).
The tests were performed under Windows 10x64, Mac OS X 10.11.6, Ubuntu 16.04 x64.