1428003 - White screen after putting a theme in preview

Status: RESOLVED INCOMPLETE

(Firefox for Android Graveyard :: Add-on Manager, defect, P5)

Description

[Sorina Florean [:sflorean]]

Environment: 
Device: Honor 8(Android 7.0), Nexus 6P (Android 8.0);
Build: 57.0.4;

Steps to reproduce:
1. Go to Add-ons and install a theme;
2. Choose another theme and put it in preview;
3. Close Firefox;
4. Launch Firefox.

Expected result:
Firefox opens without issues.

Actual result:
Firefox is not responding, is showing a white screen.
Also happening if it's clean profile.

Notes:
- See the video: https://drive.google.com/open?id=1R0MqRR8h-ByQXFjJJ6NftWMWY10lsLs9
- not reproducible on tablets

Comment 1

[Andy McKay]

This looks like it stop Firefox from loading, which seems pretty bad.

Comment 2

[Andy McKay]

We can't reproduce this. Do you have any logs from adb that might give a clue to what the cause is?

Comment 3

[Sorina Florean [:sflorean]]

Attachment: log_57.0.4.txt

Tested again with Honor 8 (Android 7.0) and Nexus 6P(Android 8.0) on all branches, and only with Honor I could reproduce this on 57.0.4, 58.0b17 and 58.0. 
Attached is a log from build 57.0.4.

Comment 4

[Andy McKay]

The only thing I can spot in there add-on related is: "01-22 13:43:07.539: I/GeckoConsole(12771): 1516621387537	addons.xpi	WARN	List of valid built-in add-ons could not be parsed.:"

Andy advice on where to direct this whuang? I think we need some Android help here.

Comment 5

[:Grisha Kruglov]

FWIW, while I can't repro the white screen state on an emulator, there are certainly a few preview related bugs that I can repro:

One bug:
1) set a theme.
2) preview another theme.
3) switch to a different tab - browser theme is auto-reset to theme set in (1)
4) switch to a tab from (2) - preview button is still in the "Cancel Preview" state.

Another bug:
1) set a theme.
2) preview another theme.
3) close browser & relaunch it.
4) the preview theme from (2) is active for a few seconds, and then it's reset to the actual theme from (1).

Perhaps the latter bug is related to what's going in Comment 0.

Comment 6

[Firefox Bug Husbandry Bot]

Re-triaging per https://bugzilla.mozilla.org/show_bug.cgi?id=1473195

Needinfo :susheel if you think this bug should be re-triaged.

Comment 7

[BMO Automation]

We have completed our launch of our new Firefox on Android. The development of the new versions use GitHub for issue tracking. If the bug report still reproduces in a current version of [Firefox on Android nightly](https://play.google.com/store/apps/details?id=org.mozilla.fenix) an issue can be reported at the [Fenix GitHub project](https://github.com/mozilla-mobile/fenix/). If you want to discuss your report please use [Mozilla's chat](https://wiki.mozilla.org/Matrix#Connect_to_Matrix) server https://chat.mozilla.org and join the [#fenix](https://chat.mozilla.org/#/room/#fenix:mozilla.org) channel.