Bug: Intermittent TV browser/components/newtab/test/browser/abouthomecache/browser_experiments_api_control.js | Should have found the Discovery Stream top sites. - null == true - got null, expected true (operator ==)
Status: RESOLVED
Priority: P5
Resolution: INCOMPLETE
Created: 2021-06-14 20:57:08+00:00
Resolved: 2023-10-23 12:04:18+00:00

**Filed by:** nerli [at] mozilla.com
**Parsed log:** https://treeherder.mozilla.org/logviewer?job_id=342720775&repo=autoland
**Full log:** https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/fGlKIWdbRc-iZQ5KQ6RPdQ/runs/1/artifacts/public/logs/live_backing.log
**Reftest URL:** https://hg.mozilla.org/mozilla-central/raw-file/tip/layout/tools/reftest/reftest-analyzer.xhtml#logurl=https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/fGlKIWdbRc-iZQ5KQ6RPdQ/runs/1/artifacts/public/logs/live_backing.log&only_show_unexpected=1

---
```
[task 2021-06-14T16:26:55.232Z] 16:26:55     INFO - TEST-START | browser/components/newtab/test/browser/abouthomecache/browser_experiments_api_control.js
[task 2021-06-14T16:26:56.820Z] 16:26:56     INFO - TEST-INFO | started process screentopng
[task 2021-06-14T16:26:57.098Z] 16:26:57     INFO - TEST-INFO | screentopng: exit 0
[task 2021-06-14T16:26:57.099Z] 16:26:57     INFO - Buffered messages logged at 16:26:55
[task 2021-06-14T16:26:57.100Z] 16:26:57     INFO - TEST-PASS | browser/components/newtab/test/browser/abouthomecache/browser_experiments_api_control.js | Sanity check the temporary file doesn't exist. - true == true - 
[task 2021-06-14T16:26:57.100Z] 16:26:57     INFO - Entering test bound test_experiments_api_control
[task 2021-06-14T16:26:57.100Z] 16:26:57     INFO - Console message: 1623688015228	AboutHomeStartupCache	TRACE	Preloaded about:newtab was updated.
[task 2021-06-14T16:26:57.101Z] 16:26:57     INFO - Console message: 1623688015236	AboutHomeStartupCache	TRACE	Preloaded about:newtab was updated.
[task 2021-06-14T16:26:57.101Z] 16:26:57     INFO - Console message: 1623688015240	AboutHomeStartupCache	TRACE	Preloaded about:newtab was updated.
[task 2021-06-14T16:26:57.101Z] 16:26:57     INFO - Console message: 1623688015426	AboutHomeStartupCache	TRACE	Preloaded about:newtab was updated.
[task 2021-06-14T16:26:57.102Z] 16:26:57     INFO - Console message: 1623688015433	AboutHomeStartupCache	TRACE	Preloaded about:newtab was updated.
[task 2021-06-14T16:26:57.102Z] 16:26:57     INFO - TEST-PASS | browser/components/newtab/test/browser/abouthomecache/browser_experiments_api_control.js | NimbusFeatures should tell us that the about:home startup cache is disabled - true == true - 
[task 2021-06-14T16:26:57.102Z] 16:26:57     INFO - Simulating restart of the browser
[task 2021-06-14T16:26:57.103Z] 16:26:57     INFO - Simulating shutdown write
[task 2021-06-14T16:26:57.104Z] 16:26:57     INFO - Console message: 1623688015598	AboutHomeStartupCache	TRACE	Never wrote a cache this session. Arming cache task.
[task 2021-06-14T16:26:57.106Z] 16:26:57     INFO - Console message: 1623688015600	AboutHomeStartupCache	TRACE	Finalizing cache task on shutdown
[task 2021-06-14T16:26:57.106Z] 16:26:57     INFO - Console message: 1623688015601	AboutHomeStartupCache	TRACE	Caching now.
[task 2021-06-14T16:26:57.107Z] 16:26:57     INFO - Console message: 1623688015601	AboutHomeStartupCache	TRACE	Parent is requesting Activity Stream state object.
[task 2021-06-14T16:26:57.108Z] 16:26:57     INFO - Console message: 1623688015604	AboutHomeStartupCache	TRACE	Parent is requesting cache streams.
[task 2021-06-14T16:26:57.109Z] 16:26:57     INFO - Console message: 1623688015605	AboutHomeStartupCache	TRACE	Skipping timeout mechanism.
[task 2021-06-14T16:26:57.110Z] 16:26:57     INFO - Console message: 1623688015637	AboutHomeStartupCache	TRACE	Ignoring preloaded newtab update after finalization.
[task 2021-06-14T16:26:57.111Z] 16:26:57     INFO - Console message: 1623688015638	AboutHomeStartupCache	TRACE	Ignoring preloaded newtab update after finalization.
[task 2021-06-14T16:26:57.112Z] 16:26:57     INFO - Console message: 1623688015715	AboutHomeStartupCache	TRACE	Ignoring preloaded newtab update after finalization.
[task 2021-06-14T16:26:57.114Z] 16:26:57     INFO - Console message: 1623688015722	AboutHomeStartupCache	TRACE	Ignoring preloaded newtab update after finalization.
[task 2021-06-14T16:26:57.114Z] 16:26:57     INFO - Console message: 1623688015726	AboutHomeStartupCache	TRACE	Ignoring preloaded newtab update after finalization.
[task 2021-06-14T16:26:57.114Z] 16:26:57     INFO - Console message: 1623688015919	AboutHomeStartupCache	TRACE	Parent received cache streams.
[task 2021-06-14T16:26:57.115Z] 16:26:57     INFO - Console message: 1623688015920	AboutHomeStartupCache	TRACE	Got cache streams.
[task 2021-06-14T16:26:57.115Z] 16:26:57     INFO - Console message: 1623688015921	AboutHomeStartupCache	TRACE	Populating cache.
[task 2021-06-14T16:26:57.115Z] 16:26:57     INFO - Console message: 1623688015921	AboutHomeStartupCache	TRACE	Populating the cache. Dooming old entry.
[task 2021-06-14T16:26:57.116Z] 16:26:57     INFO - Console message: 1623688015922	AboutHomeStartupCache	TRACE	Clearing the cache.
[task 2021-06-14T16:26:57.116Z] 16:26:57     INFO - Console message: 1623688015923	AboutHomeStartupCache	TRACE	Opening the page output stream.
[task 2021-06-14T16:26:57.119Z] 16:26:57     INFO - Console message: 1623688015924	AboutHomeStartupCache	INFO	Writing the page cache.
[task 2021-06-14T16:26:57.120Z] 16:26:57     INFO - Console message: 1623688015938	AboutHomeStartupCache	TRACE	Writing the page data is complete. Now opening the script output stream.
[task 2021-06-14T16:26:57.121Z] 16:26:57     INFO - Console message: 1623688015939	AboutHomeStartupCache	INFO	Writing the script cache.
[task 2021-06-14T16:26:57.123Z] 16:26:57     INFO - Shutdown write done
[task 2021-06-14T16:26:57.124Z] 16:26:57     INFO - Waiting for AboutHomeStartupCacheChild to uninit
[task 2021-06-14T16:26:57.125Z] 16:26:57     INFO - Console message: 1623688015948	AboutHomeStartupCache	TRACE	Writing the script cache is done. Setting version.
[task 2021-06-14T16:26:57.126Z] 16:26:57     INFO - Console message: 1623688015949	AboutHomeStartupCache	TRACE	Version is set to 20210614152133.
[task 2021-06-14T16:26:57.127Z] 16:26:57     INFO - Console message: 1623688015949	AboutHomeStartupCache	INFO	Caching of page and script is done.
[task 2021-06-14T16:26:57.127Z] 16:26:57     INFO - Console message: 1623688015950	AboutHomeStartupCache	TRACE	populateCache has finished.
[task 2021-06-14T16:26:57.134Z] 16:26:57     INFO - Console message: 1623688015951	AboutHomeStartupCache	TRACE	Done writing to cache.
[task 2021-06-14T16:26:57.136Z] 16:26:57     INFO - Console message: 1623688015952	AboutHomeStartupCache	TRACE	Done blocking shutdown.
[task 2021-06-14T16:26:57.138Z] 16:26:57     INFO - Console message: 1623688015953	AboutHomeStartupCache	TRACE	onShutdown is exiting
[task 2021-06-14T16:26:57.140Z] 16:26:57     INFO - Console message: 1623688015954	AboutHomeStartupCache	TRACE	Uninitialized.
[task 2021-06-14T16:26:57.142Z] 16:26:57     INFO - AboutHomeStartupCacheChild uninitted
[task 2021-06-14T16:26:57.142Z] 16:26:57     INFO - Waiting for about:home to load
[task 2021-06-14T16:26:57.143Z] 16:26:57     INFO - Buffered messages logged at 16:26:56
[task 2021-06-14T16:26:57.144Z] 16:26:57     INFO - about:home loaded
[task 2021-06-14T16:26:57.144Z] 16:26:57     INFO - TEST-PASS | browser/components/newtab/test/browser/abouthomecache/browser_experiments_api_control.js | There should be no page scripts. - 0 == 0 - 
[task 2021-06-14T16:26:57.145Z] 16:26:57     INFO - TEST-PASS | browser/components/newtab/test/browser/abouthomecache/browser_experiments_api_control.js | Should not have found window.__FROM_STARTUP_CACHE__ - "undefined" == "undefined" - 
[task 2021-06-14T16:26:57.146Z] 16:26:57     INFO - TEST-PASS | browser/components/newtab/test/browser/abouthomecache/browser_experiments_api_control.js | Should have found activity-stream class on <body> element - true == true - 
[task 2021-06-14T16:26:57.147Z] 16:26:57     INFO - TEST-PASS | browser/components/newtab/test/browser/abouthomecache/browser_experiments_api_control.js | Should have found the Discovery Stream top sites. - {} == true - 
[task 2021-06-14T16:26:57.147Z] 16:26:57     INFO - TEST-PASS | browser/components/newtab/test/browser/abouthomecache/browser_experiments_api_control.js | Expected the right value set to browser.startup.abouthome_cache_result scalar. - 7 == 7 - 
[task 2021-06-14T16:26:57.148Z] 16:26:57     INFO - TEST-PASS | browser/components/newtab/test/browser/abouthomecache/browser_experiments_api_control.js | NimbusFeatures should tell us that the about:home startup cache is enabled - true == true - 
[task 2021-06-14T16:26:57.149Z] 16:26:57     INFO - Simulating restart of the browser
[task 2021-06-14T16:26:57.151Z] 16:26:57     INFO - Intentionally skipping shutdown write
[task 2021-06-14T16:26:57.151Z] 16:26:57     INFO - Waiting for AboutHomeStartupCacheChild to uninit
[task 2021-06-14T16:26:57.152Z] 16:26:57     INFO - AboutHomeStartupCacheChild uninitted
[task 2021-06-14T16:26:57.153Z] 16:26:57     INFO - Waiting for AboutHomeStartupCache cache entry
[task 2021-06-14T16:26:57.154Z] 16:26:57     INFO - Got AboutHomeStartupCache cache entry
[task 2021-06-14T16:26:57.155Z] 16:26:57     INFO - Ensuring cache bytes are available
[task 2021-06-14T16:26:57.156Z] 16:26:57     INFO - Console message: 1623688016538	AboutHomeStartupCache	TRACE	Initting.
[task 2021-06-14T16:26:57.158Z] 16:26:57     INFO - Console message: 1623688016538	AboutHomeStartupCache	TRACE	Constructing pipes.
[task 2021-06-14T16:26:57.159Z] 16:26:57     INFO - Console message: 1623688016539	AboutHomeStartupCache	TRACE	Cache entry is available.
[task 2021-06-14T16:26:57.160Z] 16:26:57     INFO - Console message: 1623688016540	AboutHomeStartupCache	TRACE	Connecting nsICacheEntry to pipes.
[task 2021-06-14T16:26:57.162Z] 16:26:57     INFO - Console message: 1623688016540	AboutHomeStartupCache	TRACE	
[task 2021-06-14T16:26:57.164Z] 16:26:57     INFO - Console message: 1623688016541	AboutHomeStartupCache	INFO	Version retrieved is: 20210614152133
[task 2021-06-14T16:26:57.165Z] 16:26:57     INFO - Console message: 1623688016542	AboutHomeStartupCache	TRACE	Connecting page stream to pipe.
[task 2021-06-14T16:26:57.166Z] 16:26:57     INFO - Console message: 1623688016544	AboutHomeStartupCache	TRACE	Connecting script stream to pipe.
[task 2021-06-14T16:26:57.167Z] 16:26:57     INFO - Console message: 1623688016548	AboutHomeStartupCache	TRACE	Streams connected to pipes.
[task 2021-06-14T16:26:57.168Z] 16:26:57     INFO - Console message: 1623688016550	AboutHomeStartupCache	TRACE	Initialized.
[task 2021-06-14T16:26:57.169Z] 16:26:57     INFO - Console message: 1623688016550	AboutHomeStartupCache	TRACE	A privileged about content process is launching with ID 1.
[task 2021-06-14T16:26:57.169Z] 16:26:57     INFO - Console message: 1623688016551	AboutHomeStartupCache	INFO	Sending input streams down to content process.
[task 2021-06-14T16:26:57.170Z] 16:26:57     INFO - Console message: 1623688016577	AboutHomeStartupCache	INFO	Page stream connected to pipe.
[task 2021-06-14T16:26:57.171Z] 16:26:57     INFO - Console message: 1623688016582	AboutHomeStartupCache	INFO	Script stream connected to pipe.
[task 2021-06-14T16:26:57.172Z] 16:26:57     INFO - Waiting for about:home to load
[task 2021-06-14T16:26:57.173Z] 16:26:57     INFO - Console message: 1623688016731	AboutHomeStartupCache	TRACE	Received usage result. Success = true
[task 2021-06-14T16:26:57.173Z] 16:26:57     INFO - about:home loaded
[task 2021-06-14T16:26:57.174Z] 16:26:57     INFO - TEST-PASS | browser/components/newtab/test/browser/abouthomecache/browser_experiments_api_control.js | There should be page scripts. - true == true - 
[task 2021-06-14T16:26:57.175Z] 16:26:57     INFO - TEST-PASS | browser/components/newtab/test/browser/abouthomecache/browser_experiments_api_control.js | Found about:home?jscache script tag, indicating the cached doc - "about:home?jscache" == "about:home?jscache" - 
[task 2021-06-14T16:26:57.175Z] 16:26:57     INFO - TEST-PASS | browser/components/newtab/test/browser/abouthomecache/browser_experiments_api_control.js | Should have found window.__FROM_STARTUP_CACHE__ - true == true - 
[task 2021-06-14T16:26:57.176Z] 16:26:57     INFO - TEST-PASS | browser/components/newtab/test/browser/abouthomecache/browser_experiments_api_control.js | Should have found activity-stream class on <body> element - true == true - 
[task 2021-06-14T16:26:57.177Z] 16:26:57     INFO - Buffered messages finished
[task 2021-06-14T16:26:57.177Z] 16:26:57     INFO - TEST-UNEXPECTED-FAIL | browser/components/newtab/test/browser/abouthomecache/browser_experiments_api_control.js | Should have found the Discovery Stream top sites. - null == true - got null, expected true (operator ==)
[task 2021-06-14T16:26:57.178Z] 16:26:57     INFO - Stack trace:
[task 2021-06-14T16:26:57.178Z] 16:26:57     INFO - @chrome://mochitests/content/browser/browser/components/newtab/test/browser/abouthomecache/head.js:269:12
[task 2021-06-14T16:26:57.178Z] 16:26:57     INFO - execute@resource://specialpowers/SpecialPowersSandbox.jsm:141:12
[task 2021-06-14T16:26:57.179Z] 16:26:57     INFO - _spawnTask@resource://specialpowers/SpecialPowersChild.jsm:1650:15
[task 2021-06-14T16:26:57.179Z] 16:26:57     INFO - receiveMessage@resource://specialpowers/SpecialPowersChild.jsm:310:21
[task 2021-06-14T16:26:57.180Z] 16:26:57     INFO - TEST-PASS | browser/components/newtab/test/browser/abouthomecache/browser_experiments_api_control.js | Expected the right value set to browser.startup.abouthome_cache_result scalar. - 6 == 6 - 
[task 2021-06-14T16:26:57.180Z] 16:26:57     INFO - Leaving test bound test_experiments_api_control
[task 2021-06-14T16:26:57.278Z] 16:26:57     INFO - Simulating restart of the browser
[task 2021-06-14T16:26:57.279Z] 16:26:57     INFO - Simulating shutdown write
[task 2021-06-14T16:26:57.281Z] 16:26:57     INFO - Console message: 1623688017269	AboutHomeStartupCache	TRACE	Never wrote a cache this session. Arming cache task.
[task 2021-06-14T16:26:57.286Z] 16:26:57     INFO - Console message: 1623688017270	AboutHomeStartupCache	TRACE	Finalizing cache task on shutdown
[task 2021-06-14T16:26:57.289Z] 16:26:57     INFO - Console message: 1623688017271	AboutHomeStartupCache	TRACE	Caching now.
[task 2021-06-14T16:26:57.291Z] 16:26:57     INFO - Console message: 1623688017272	AboutHomeStartupCache	TRACE	Parent is requesting Activity Stream state object.
[task 2021-06-14T16:26:57.294Z] 16:26:57     INFO - Console message: 1623688017272	AboutHomeStartupCache	TRACE	Parent is requesting cache streams.
[task 2021-06-14T16:26:57.296Z] 16:26:57     INFO - Console message: 1623688017273	AboutHomeStartupCache	TRACE	Skipping timeout mechanism.
[task 2021-06-14T16:26:57.471Z] 16:26:57     INFO - GECKO(3022) | console.warn: "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAGQAAABkCAYAAABw4pVUAAAA/UlEQVR4nO3RMQ0AMAzAsPIn3d5DsBw2gkiZJWV+B/AyJMaQGENiDIkxJMaQGENiDIkxJMaQGENiDIkxJMaQGENiDIkxJMaQGENiDIkxJMaQGENiDIkxJMaQGENiDIkxJMaQGENiDIkxJMaQGENiDIkxJMaQGENiDIkxJMaQGENiDIkxJMaQGENiDIkxJMaQGENiDIkxJMaQGENiDIkxJMaQGENiDIkxJMaQGENiDIkxJMaQGENiDIkxJMaQGENiDIkxJMaQGENiDIkxJMaQGENiDIkxJMaQGENiDIkxJMaQGENiDIkxJMaQGENiDIkxJMaQGENiDIkxJMaQmAP4K6zWNUjE4wAAAABJRU5ErkJggg== is not allowed for anchor targets."
[task 2021-06-14T16:26:57.492Z] 16:26:57     INFO - Console message: 1623688017476	AboutHomeStartupCache	TRACE	Parent received cache streams.
[task 2021-06-14T16:26:57.493Z] 16:26:57     INFO - Console message: 1623688017476	AboutHomeStartupCache	TRACE	Got cache streams.
[task 2021-06-14T16:26:57.493Z] 16:26:57     INFO - Console message: 1623688017477	AboutHomeStartupCache	TRACE	Populating cache.
[task 2021-06-14T16:26:57.493Z] 16:26:57     INFO - Console message: 1623688017477	AboutHomeStartupCache	TRACE	Populating the cache. Dooming old entry.
[task 2021-06-14T16:26:57.493Z] 16:26:57     INFO - Console message: 1623688017478	AboutHomeStartupCache	TRACE	Clearing the cache.
[task 2021-06-14T16:26:57.494Z] 16:26:57     INFO - Console message: 1623688017479	AboutHomeStartupCache	TRACE	Opening the page output stream.
[task 2021-06-14T16:26:57.494Z] 16:26:57     INFO - Console message: 1623688017479	AboutHomeStartupCache	INFO	Writing the page cache.
[task 2021-06-14T16:26:57.509Z] 16:26:57     INFO - Console message: 1623688017491	AboutHomeStartupCache	TRACE	Writing the page data is complete. Now opening the script output stream.
[task 2021-06-14T16:26:57.509Z] 16:26:57     INFO - Console message: 1623688017494	AboutHomeStartupCache	INFO	Writing the script cache.
[task 2021-06-14T16:26:57.509Z] 16:26:57     INFO - Shutdown write done
[task 2021-06-14T16:26:57.510Z] 16:26:57     INFO - Waiting for AboutHomeStartupCacheChild to uninit
[task 2021-06-14T16:26:57.514Z] 16:26:57     INFO - Console message: 1623688017500	AboutHomeStartupCache	TRACE	Writing the script cache is done. Setting version.
[task 2021-06-14T16:26:57.514Z] 16:26:57     INFO - Console message: 1623688017501	AboutHomeStartupCache	TRACE	Version is set to 20210614152133.
[task 2021-06-14T16:26:57.515Z] 16:26:57     INFO - Console message: 1623688017502	AboutHomeStartupCache	INFO	Caching of page and script is done.
[task 2021-06-14T16:26:57.516Z] 16:26:57     INFO - Console message: 1623688017503	AboutHomeStartupCache	TRACE	populateCache has finished.
[task 2021-06-14T16:26:57.517Z] 16:26:57     INFO - Console message: 1623688017504	AboutHomeStartupCache	TRACE	Done writing to cache.
[task 2021-06-14T16:26:57.517Z] 16:26:57     INFO - Console message: 1623688017505	AboutHomeStartupCache	TRACE	Done blocking shutdown.
[task 2021-06-14T16:26:57.518Z] 16:26:57     INFO - Console message: 1623688017505	AboutHomeStartupCache	TRACE	onShutdown is exiting
[task 2021-06-14T16:26:57.518Z] 16:26:57     INFO - Console message: 1623688017506	AboutHomeStartupCache	TRACE	Uninitialized.
[task 2021-06-14T16:26:57.526Z] 16:26:57     INFO - AboutHomeStartupCacheChild uninitted
[task 2021-06-14T16:26:57.542Z] 16:26:57     INFO - Waiting for AboutHomeStartupCache cache entry
[task 2021-06-14T16:26:57.542Z] 16:26:57     INFO - Got AboutHomeStartupCache cache entry
[task 2021-06-14T16:26:57.542Z] 16:26:57     INFO - Ensuring cache bytes are available
[task 2021-06-14T16:26:57.542Z] 16:26:57     INFO - Console message: 1623688017521	AboutHomeStartupCache	TRACE	Initting.
[task 2021-06-14T16:26:57.542Z] 16:26:57     INFO - Console message: 1623688017523	AboutHomeStartupCache	TRACE	Constructing pipes.
[task 2021-06-14T16:26:57.542Z] 16:26:57     INFO - Console message: 1623688017525	AboutHomeStartupCache	TRACE	Cache entry is available.
[task 2021-06-14T16:26:57.545Z] 16:26:57     INFO - Console message: 1623688017525	AboutHomeStartupCache	TRACE	Connecting nsICacheEntry to pipes.
[task 2021-06-14T16:26:57.546Z] 16:26:57     INFO - Console message: 1623688017526	AboutHomeStartupCache	TRACE	
[task 2021-06-14T16:26:57.546Z] 16:26:57     INFO - Console message: 1623688017526	AboutHomeStartupCache	INFO	Version retrieved is: 20210614152133
[task 2021-06-14T16:26:57.548Z] 16:26:57     INFO - Console message: 1623688017527	AboutHomeStartupCache	TRACE	Connecting page stream to pipe.
[task 2021-06-14T16:26:57.551Z] 16:26:57     INFO - Console message: 1623688017530	AboutHomeStartupCache	TRACE	Connecting script stream to pipe.
[task 2021-06-14T16:26:57.551Z] 16:26:57     INFO - Console message: 1623688017532	AboutHomeStartupCache	TRACE	Streams connected to pipes.
[task 2021-06-14T16:26:57.553Z] 16:26:57     INFO - Console message: 1623688017533	AboutHomeStartupCache	TRACE	Initialized.
[task 2021-06-14T16:26:57.555Z] 16:26:57     INFO - Console message: 1623688017534	AboutHomeStartupCache	TRACE	A privileged about content process is launching with ID 1.
[task 2021-06-14T16:26:57.556Z] 16:26:57     INFO - Console message: 1623688017534	AboutHomeStartupCache	INFO	Sending input streams down to content process.
[task 2021-06-14T16:26:57.571Z] 16:26:57     INFO - Console message: 1623688017558	AboutHomeStartupCache	INFO	Page stream connected to pipe.
[task 2021-06-14T16:26:57.572Z] 16:26:57     INFO - Console message: 1623688017560	AboutHomeStartupCache	INFO	Script stream connected to pipe.
[task 2021-06-14T16:26:57.667Z] 16:26:57     INFO - Waiting for about:home to load
[task 2021-06-14T16:26:57.731Z] 16:26:57     INFO - Console message: 1623688017714	AboutHomeStartupCache	TRACE	Received usage result. Success = true
[task 2021-06-14T16:26:57.795Z] 16:26:57     INFO - about:home loaded
[task 2021-06-14T16:26:57.897Z] 16:26:57     INFO - GECKO(3022) | MEMORY STAT vsizeMaxContiguous not supported in this build configuration.
[task 2021-06-14T16:26:57.897Z] 16:26:57     INFO - GECKO(3022) | MEMORY STAT | vsize 2871MB | residentFast 305MB | heapAllocated 120MB
[task 2021-06-14T16:26:57.897Z] 16:26:57     INFO - TEST-OK | browser/components/newtab/test/browser/abouthomecache/browser_experiments_api_control.js | took 2665ms
[task 2021-06-14T16:26:57.953Z] 16:26:57     INFO - checking window state
```