1958336 - Intermittent browser/extensions/newtab/test/browser/browser_newtab_towindow.js | single tracking bug

Status: RESOLVED FIXED

(Firefox :: New Tab Page, defect, P5)

Description

[Treeherder Bug Filer]

Filed by: smolnar [at] mozilla.com
Parsed log: https://treeherder.mozilla.org/logviewer?job_id=502249591&repo=autoland
Full log: https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/X09tgMMhQbSBpmz9msEVNw/runs/0/artifacts/public/logs/live_backing.log

---

TEST-PASS | browser/extensions/newtab/test/browser/browser_newtab_towindow.js | about:newtab moved to window - 
[task 2025-04-03T15:31:12.834Z] 15:31:12     INFO - Buffered messages finished
[task 2025-04-03T15:31:12.834Z] 15:31:12     INFO - TEST-UNEXPECTED-FAIL | browser/extensions/newtab/test/browser/browser_newtab_towindow.js | Test timed out - 
[task 2025-04-03T15:31:12.835Z] 15:31:12     INFO - GECKO(13469) | Completed ShutdownLeaks collections in process 13469
[task 2025-04-03T15:31:12.835Z] 15:31:12     INFO - TEST-START | Shutdown
<...>
INFO - GECKO(13469) | [Parent 13469: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 13 (7fd10001b800) [pid = 13469] [serial = 21] [outer = 0] [url = about:blank]
[task 2025-04-03T15:31:14.542Z] 15:31:14     INFO - GECKO(13469) | [Parent 13469: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 12 (7fd132c6ac00) [pid = 13469] [serial = 6] [outer = 0] [url = about:blank]
[task 2025-04-03T15:31:14.543Z] 15:31:14     INFO - GECKO(13469) | [Parent 13469: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 11 (7fd10cdf8000) [pid = 13469] [serial = 10] [outer = 0] [url = chrome://global/content/backgroundPageThumbs.xhtml]
[task 2025-04-03T15:31:14.544Z] 15:31:14     INFO - GECKO(13469) | [Parent 13469: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 10 (7fd1050cfa00) [pid = 13469] [serial = 1] [outer = 0] [url = chrome://browser/content/browser.xhtml]
[task 2025-04-03T15:31:14.545Z] 15:31:14     INFO - GECKO(13469) | [Parent 13469: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 9 (7fd0f525bc00) [pid = 13469] [serial = 8] [outer = 0] [url = chrome://mochikit/content/browser-harness.xhtml]
[task 2025-04-03T15:31:14.545Z] 15:31:14     INFO - GECKO(13469) | [Parent 13469: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 8 (7fd0f648a200) [pid = 13469] [serial = 19] [outer = 0] [url = chrome://browser/content/browser.xhtml]
[task 2025-04-03T15:31:14.545Z] 15:31:14     INFO - GECKO(13469) | [Parent 13469: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 7 (7fd1050d4c00) [pid = 13469] [serial = 3] [outer = 0] [url = chrome://extensions/content/dummy.xhtml]
[task 2025-04-03T15:31:14.638Z] 15:31:14     INFO - GECKO(13469) | [Parent 13469: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 6 (7fd1018aea00) [pid = 13469] [serial = 5] [outer = 0] [url = chrome://extensions/content/dummy.xhtml]
[task 2025-04-03T15:31:14.639Z] 15:31:14     INFO - GECKO(13469) | [Parent 13469: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 5 (7fd0f4160600) [pid = 13469] [serial = 20] [outer = 0] [url = about:blank]
[task 2025-04-03T15:31:14.640Z] 15:31:14     INFO - GECKO(13469) | [Parent 13469: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 4 (7fd0f415d400) [pid = 13469] [serial = 9] [outer = 0] [url = about:blank]
[task 2025-04-03T15:31:14.640Z] 15:31:14     INFO - GECKO(13469) | [Parent 13469: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 3 (7fd108b40c00) [pid = 13469] [serial = 2] [outer = 0] [url = about:blank]
[task 2025-04-03T15:31:14.641Z] 15:31:14     INFO - GECKO(13469) | [Parent 13469: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 2 (7fd0ec7e1600) [pid = 13469] [serial = 22] [outer = 0] [url = about:blank]
[task 2025-04-03T15:31:14.642Z] 15:31:14     INFO - GECKO(13469) | [Parent 13469: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 1 (7fd1007edd00) [pid = 13469] [serial = 7] [outer = 0] [url = about:blank]
[task 2025-04-03T15:31:14.642Z] 15:31:14     INFO - GECKO(13469) | [Parent 13469: Main Thread]: I/DocShellAndDOMWindowLeak --DOMWINDOW == 0 (7fd0f6016b00) [pid = 13469] [serial = 12] [outer = 0] [url = chrome://global/content/backgroundPageThumbs.xhtml]
[task 2025-04-03T15:31:14.660Z] 15:31:14     INFO - GECKO(13469) | [Parent 13469, Main Thread] WARNING: NS_ENSURE_SUCCESS_VOID(rv) failed with result 0x8000FFFF (NS_ERROR_UNEXPECTED): file /builds/worker/checkouts/gecko/dom/file/uri/BlobURLProtocolHandler.cpp:419
[task 2025-04-03T15:31:14.661Z] 15:31:14     INFO - GECKO(13469) | [Parent 13469, Main Thread] WARNING: NS_ENSURE_TRUE(!!svc) failed: file /builds/worker/checkouts/gecko/dom/file/uri/BlobURLProtocolHandler.cpp:528
[task 2025-04-03T15:31:14.708Z] 15:31:14     INFO - GECKO(13469) | [Parent 13469, IPC I/O Parent] WARNING: process 13628 is a zombie: file /builds/worker/checkouts/gecko/ipc/chromium/src/base/process_util_posix.cc:250
[task 2025-04-03T15:31:14.709Z] 15:31:14     INFO - GECKO(13469) | [Parent 13469, IPC I/O Parent] WARNING: process 13553 is a zombie: file /builds/worker/checkouts/gecko/ipc/chromium/src/base/process_util_posix.cc:250
[task 2025-04-03T15:31:14.720Z] 15:31:14     INFO - TEST-INFO | Main app process: exit 0
[task 2025-04-03T15:31:14.721Z] 15:31:14     INFO - TEST-UNEXPECTED-FAIL | browser/extensions/newtab/test/browser/browser_newtab_towindow.js | Application shut down (without crashing) in the middle of a test!
[task 2025-04-03T15:31:14.721Z] 15:31:14     INFO - TEST-INFO took 91330ms
[task 2025-04-03T15:31:14.721Z] 15:31:14     INFO - TEST-INFO | Confirming we saw 73 DOCSHELL created and 73 destroyed log strings.
[task 2025-04-03T15:31:14.721Z] 15:31:14     INFO - TEST-INFO | Confirming we saw 196 DOMWINDOW created and 196 destroyed log strings.
[task 2025-04-03T15:31:14.722Z] 15:31:14     INFO - runtests.py | Application ran for: 0:02:13.960988
[task 2025-04-03T15:31:14.722Z] 15:31:14     INFO - zombiecheck | Reading PID log: /tmp/tmp5w6p7juupidlog
[task 2025-04-03T15:31:14.722Z] 15:31:14     INFO - ==> process 13469 launched child process 13535
[task 2025-04-03T15:31:14.722Z] 15:31:14     INFO - zombiecheck | Checking for orphan process with PID: 13535
[task 2025-04-03T15:31:14.723Z] 15:31:14     INFO - Stopping web server
[task 2025-04-03T15:31:14.729Z] 15:31:14     INFO - Server shut down.
[task 2025-04-03T15:31:14.729Z] 15:31:14     INFO - Web server killed.
[task 2025-04-03T15:31:14.729Z] 15:31:14     INFO - Stopping web socket server
[task 2025-04-03T15:31:14.730Z] 15:31:14     INFO - Stopping ssltunnel
[task 2025-04-03T15:31:14.730Z] 15:31:14     INFO - Stopping gst for v4l2loopback
[task 2025-04-03T15:31:14.730Z] 15:31:14     INFO - leakcheck | Processing log file /tmp/tmp6_dhidnh.mozrunner/runtests_leaks.log for scope browser/extensions/newtab/test/browser/browser.toml
[task 2025-04-03T15:31:14.730Z] 15:31:14     INFO - TEST-INFO | leakcheck | default process: leak threshold set at 0 bytes
[task 2025-04-03T15:31:14.730Z] 15:31:14     INFO - TEST-INFO | leakcheck | tab process: leak threshold set at 0 bytes
[task 2025-04-03T15:31:14.730Z] 15:31:14     INFO - TEST-INFO | leakcheck | gmplugin process: leak threshold set at 20000 bytes
<...>

Comment 2

[Intermittent Failures Robot]

3 failures were associated with this bug in the last 7 days.

Repository breakdown:

• autoland: 1
• mozilla-beta: 2

Table

	no_variant	swr
linux1804-64-qr--/debug		1
macosx1015-64-qr--/debug	1
windows11-64-24h2--/debug	1

For more details, see:

https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1958336&startday=2025-03-31&endday=2025-04-06&tree=all

Comment 3

[Intermittent Failures Robot]

3 failures were associated with this bug in the last 7 days.

Repository breakdown:

• autoland: 1
• try: 1
• mozilla-beta: 1

Table

	no_variant
windows11-32-24h2--/debug	1
windows11-64-24h2--/debug	2

For more details, see:

https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1958336&startday=2025-04-07&endday=2025-04-13&tree=all

Comment 4

[Intermittent Failures Robot]

2 failures were associated with this bug in the last 7 days.

Repository breakdown:

• autoland: 2

Table

	spi-nw
linux1804-64-qr--/debug	2

For more details, see:

https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1958336&startday=2025-04-14&endday=2025-04-20&tree=all

Comment 5

[Intermittent Failures Robot]

1 failures were associated with this bug in the last 7 days.

Repository breakdown:

• autoland: 1

Table

	swr
linux1804-64-qr--/debug	1

For more details, see:

https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1958336&startday=2025-04-28&endday=2025-05-04&tree=all

Comment 6

[Intermittent Failures Robot]

1 failures were associated with this bug in the last 7 days.

Repository breakdown:

• mozilla-beta: 1

Table

	no_variant
windows11-x86/debug	1

For more details, see:

https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1958336&startday=2025-05-05&endday=2025-05-11&tree=all

Comment 7

[BugBot [:suhaib / :marco]]

https://wiki.mozilla.org/Bug_Triage#Intermittent_Test_Failure_Cleanup
For more information, please visit BugBot documentation.

Comment 8

[Intermittent Failures Robot]

2 failures were associated with this bug in the last 7 days.

Repository breakdown:

• autoland: 1
• mozilla-central: 1

Table

	asan	debug	no_variant	opt	spi-nw	swr	tsan
linux1804-x86_64/debug					1	1

For more details, see:

https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1958336&startday=2025-06-02&endday=2025-06-08&tree=all

Comment 9

[Treeherder Bug Filer]

New failure instance: https://treeherder.mozilla.org/logviewer?job_id=514716091&repo=mozilla-beta

Comment 10

[Intermittent Failures Robot]

9 failures were associated with this bug in the last 7 days.

Repository breakdown:

• try: 1
• mozilla-central: 2
• mozilla-beta: 3
• autoland: 3

Table

	no_variant	s	socketprocess_networking	swgl	swgl+a11y_checks	swr
linux-x86/ccov	1
linux-x86/unknown build		3
linux2404-x86_64/debug						2
windows11-x86/debug	3

For more details, see:

https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1958336&startday=2025-06-23&endday=2025-06-29&tree=all

Comment 11

[Intermittent Failures Robot]

3 failures were associated with this bug in the last 7 days.

Repository breakdown:

• mozilla-beta: 2
• mozilla-central: 1

Table

	no_variant	s	socketprocess_networking	swgl	swgl+a11y_checks	swr
linux-x86/unknown build		2
linux2404-x86_64/debug						1/90

For more details, see:

https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1958336&startday=2025-06-30&endday=2025-07-06&tree=all

Comment 12

[Intermittent Failures Robot]

2 failures were associated with this bug in the last 7 days.

Repository breakdown:

• autoland: 2

Table

	no_variant	socketprocess_networking	spi-nw	swgl	swgl+a11y_checks
linux2404-x86_64/debug			1/267
windows11-x86/debug	1/93

• x/y indicates test failures and total runs; only x means number of runs is unknown.

For more details, see:

https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1958336&startday=2025-07-14&endday=2025-07-20&tree=all

Comment 13

[Intermittent Failures Robot]

1 failures were associated with this bug in the last 7 days.

Repository breakdown:

• try: 1

Table

	no_variant
windows11-x86_64/debug	1/79

• x/y indicates test failures and total runs; only x means number of runs is unknown.

For more details, see:

https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1958336&startday=2025-07-21&endday=2025-07-27&tree=all

Comment 14

[Intermittent Failures Robot]

2 failures were associated with this bug in the last 7 days.

Repository breakdown:

• mozilla-release: 1
• autoland: 1

Table

	no_variant	s
linux-x86/unknown build		1
windows11-x86_64/debug	1/72

• x/y indicates test failures and total runs; only x means number of runs is unknown.

For more details, see:

https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1958336&startday=2025-07-28&endday=2025-08-03&tree=all

Comment 15

[BugBot [:suhaib / :marco]]

https://wiki.mozilla.org/Bug_Triage#Intermittent_Test_Failure_Cleanup
For more information, please visit BugBot documentation.

Comment 16

[Intermittent Failures Robot]

1 failures were associated with this bug in the last 7 days.

Repository breakdown:

• autoland: 1

Table

	spi-nw
windows11-x86_64/debug	1

For more details, see:

https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1958336&startday=2025-09-15&endday=2025-09-21&tree=all

Comment 17

[Intermittent Failures Robot]

1 failures were associated with this bug in the last 7 days.

Repository breakdown:

• mozilla-beta: 1

Table

	no_variant
windows11-x86/debug	1

For more details, see:

https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1958336&startday=2025-09-29&endday=2025-10-05&tree=all

Comment 18

[Treeherder Bug Filer]

New failure instance: https://treeherder.mozilla.org/logviewer?job_id=559242454&repo=autoland

Comment 19

[Intermittent Failures Robot]

6 failures were associated with this bug in the last 7 days.

Repository breakdown:

• mozilla-esr140: 1
• autoland: 5

Table

	a11y-checks-swr	a11y_checks+swgl	no_variant	swgl	swr	trainhop	trainhop-beta	trainhop-rel
linux1804-x86_64/debug					1
linux2404-x86_64/opt	1				2		1	1

For more details, see:

https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1958336&startday=2026-04-08&endday=2026-04-14&tree=all

Comment 20

[Intermittent Failures Robot]

9 failures were associated with this bug in the last 7 days.

Repository breakdown:

• autoland: 9

Table

	a11y-checks-swr	a11y_checks+swgl	no_variant	standalone	swgl	swr	trainhop	trainhop-beta	trainhop-rel
linux2404-x86_64/opt	1					2		1	5

For more details, see:

https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1958336&startday=2026-04-13&endday=2026-04-19&tree=all

Comment 21

[BugBot [:suhaib / :marco]]

https://wiki.mozilla.org/Bug_Triage#Intermittent_Test_Failure_Cleanup
For more information, please visit BugBot documentation.

Comment 22

[Intermittent Failures Robot]

1 failures were associated with this bug in the last 7 days.

Repository breakdown:

• mozilla-esr140: 1

Table

	no_variant
windows11-x86/debug	1

For more details, see:

https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1958336&startday=2026-06-22&endday=2026-06-28&tree=all

Comment 23

[Intermittent Failures Robot]

1 failures were associated with this bug in the last 7 days.

Repository breakdown:

• mozilla-esr140: 1

Table

	no_variant	trainhop
macosx1015-x86_64/debug	1

For more details, see:

https://treeherder.mozilla.org/intermittent-failures/bugdetails?bug=1958336&startday=2026-06-29&endday=2026-07-05&tree=all

Comment 24

[Florian Quèze [:florian]]

Attachment: Bug 1958336 - Click the example.com top site by URL in browser_newtab_towindow.js, r=#home-newtab-reviewers.

The test waited for and clicked the first .top-sites a, which is not
necessarily the example.com tile setTestTopSites configures. A search shortcut
pinned by an earlier test in the job stays in browser.newtabpage.pinned, and
clicking one sends FILL_SEARCH_TERM rather than OPEN_LINK, so no tab ever opens
and waitForNewTab waits until the harness kills the test.

Comment 25

[Pulsebot]

Pushed by [e-mail]:
https://github.com/mozilla-firefox/firefox/commit/9c286b69aaea
https://hg.mozilla.org/integration/autoland/rev/4c947ab642fe
Click the example.com top site by URL in browser_newtab_towindow.js, r=mconley.

Comment 26

[Sandor Molnar[:smolnar]]

https://hg.mozilla.org/mozilla-central/rev/4c947ab642fe

Comment 27

[Sandor Molnar[:smolnar]]

https://hg.mozilla.org/mozilla-central/rev/4c947ab642fe

Comment 28

[Sandor Molnar[:smolnar]]

https://hg.mozilla.org/mozilla-central/rev/4c947ab642fe