Bug: Intermittent JavaScript error: moz-extension://dfb83a0c-b826-4ea2-98f4-2603b45988e2/content/tabswitch-content-process.js, line 17: TypeError: can't access property "getURL", extensionPolicy is null
Status: RESOLVED
Priority: P5
Resolution: INCOMPLETE
Created: 2021-04-23 16:30:16+00:00
Resolved: 2023-06-12 12:01:41+00:00

**Filed by:** dluca [at] mozilla.com
**Parsed log:** https://treeherder.mozilla.org/logviewer?job_id=337566172&repo=autoland
**Full log:** https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/EBIAd9oySt6e2AO8ZIzNyg/runs/0/artifacts/public/logs/live_backing.log

---
```
INFO -  TEST-START | tabswitch
[task 2021-04-23T15:10:38.604Z] 15:10:38     INFO -  Initialising browser for tabswitch test...
[task 2021-04-23T15:10:38.605Z] 15:10:38     INFO -  Cloning profile located at C:\Users\task_1619187963\build\tests\talos\talos\base_profile
[task 2021-04-23T15:10:38.607Z] 15:10:38     INFO -  Merging profile: C:\Users\task_1619187963\build\tests\talos\talos\profile_data\base
[task 2021-04-23T15:10:38.607Z] 15:10:38     INFO -  Merging profile: C:\Users\task_1619187963\build\tests\talos\talos\profile_data\common
[task 2021-04-23T15:10:38.615Z] 15:10:38     INFO -  Merging profile: C:\Users\task_1619187963\build\tests\talos\talos\profile_data\perf
[task 2021-04-23T15:10:38.620Z] 15:10:38     INFO -  Installing Add-ons:
[task 2021-04-23T15:10:38.620Z] 15:10:38     INFO -  ['C:\\Users\\task_1619187963\\build\\tests\\talos\\talos/talos-powers', 'C:\\Users\\task_1619187963\\build\\tests\\talos\\talos/tests/tabswitch', 'C:\\Users\\task_1619187963\\build\\tests\\talos\\talos/pageloader']
[task 2021-04-23T15:10:38.646Z] 15:10:38     INFO -  Installing Webextensions:
[task 2021-04-23T15:10:38.647Z] 15:10:38     INFO -  Application command: C:\Users\task_1619187963\build\application\firefox\firefox -wait-for-browser -no-deelevate http://127.0.0.1:49875/getInfo.html --wait-for-browser -profile C:\Users\task_1619187963\AppData\Local\Temp\tmphqbp22ij\profile
[task 2021-04-23T15:10:38.656Z] 15:10:38     INFO -  TEST-INFO | started process 5132 (C:\Users\task_1619187963\build\application\firefox\firefox -wait-for-browser -no-deelevate http://127.0.0.1:49875/getInfo.html)
[task 2021-04-23T15:10:40.672Z] 15:10:40     INFO -  console.warn: SearchSettings: "get: No settings file exists, new profile?" (new NotFoundError("Could not open the file at C:\\Users\\task_1619187963\\AppData\\Local\\Temp\\tmphqbp22ij\\profile\\search.json.mozlz4", (void 0)))
[task 2021-04-23T15:10:41.052Z] 15:10:41     INFO -  __metrics
[task 2021-04-23T15:10:41.052Z] 15:10:41     INFO -  	Screen width/height: 1024/768
[task 2021-04-23T15:10:41.052Z] 15:10:41     INFO -  	colorDepth: 24
[task 2021-04-23T15:10:41.053Z] 15:10:41     INFO -  	Browser inner width/height: 1024/682
[task 2021-04-23T15:10:41.053Z] 15:10:41     INFO -  __metrics
[task 2021-04-23T15:10:41.147Z] 15:10:41     INFO -  JavaScript warning: resource://gre/modules/Troubleshoot.jsm, line 692: WebGL context was lost.
[task 2021-04-23T15:10:41.161Z] 15:10:41     INFO -  JavaScript warning: resource://gre/modules/Troubleshoot.jsm, line 692: WebGL context was lost.
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qualified","status":"available","log":[{"type":"default","status":"available"}]},{"name":"WEBRENDER_COMPOSITOR","description":"WebRender native compositor","status":"available","log":[{"type":"default","status":"available"}]},{"name":"WEBRENDER_PARTIAL","description":"WebRender partial present","status":"available","log":[{"type":"default","status":"available"}]},{"name":"WEBRENDER_SHADER_CACHE","description":"WebRender shader disk cache","status":"available","log":[{"type":"default","status":"available"}]},{"name":"WEBRENDER_OPTIMIZED_SHADERS","description":"WebRender optimized shaders","status":"available","log":[{"type":"default","status":"available"}]},{"name":"WEBRENDER_ANGLE","description":"WebRender ANGLE","status":"available","log":[{"type":"default","status":"available"}]},{"name":"WEBRENDER_DCOMP_PRESENT","description":"WebRender DirectComposition","status":"available","log":[{"type":"default","status":"available"}]},{"name":"WEBRENDER_SOFTWARE","description":"WebRender software fallback","status":"available","log":[{"type":"default","status":"available"}]},{"name":"OMTP","description":"Off Main Thread Painting","status":"disabled","log":[{"type":"default","status":"disabled","message":"Disabled by default"}]},{"name":"WEBGPU","description":"WebGPU","status":"disabled","log":[{"type":"default","status":"disabled","message":"Disabled by default"}]}],"fallbacks":[]},"crashGuards":[]},"experimentalFeatures":[["experimental-features-abouthome-startup-cache","browser.startup.homepage.abouthome_cache.enabled",true],["experimental-features-cookie-samesite-lax-by-default2","network.cookie.sameSite.laxByDefault",true],["experimental-features-cookie-samesite-none-requires-secure2","network.cookie.sameSite.noneRequiresSecure",true],["experimental-features-cookie-samesite-schemeful","network.cookie.sameSite.schemeful",true],["experimental-features-css-constructable-stylesheets","layout.css.constructable-stylesheets.enabled",false],["experimental-features-css-masonry2","layout.css.grid-template-masonry-value.enabled",true],["experimental-features-devtools-color-scheme-simulation","devtools.inspector.color-scheme-simulation.enabled",true],["experimental-features-devtools-compatibility-panel","devtools.inspector.compatibility.enabled",true],["experimental-features-devtools-execution-context-selector","devtools.webconsole.input.context",true],["experimental-features-devtools-serviceworker-debugger-support","devtools.debugger.features.windowless-service-workers",false],["experimental-features-fission","fission.autostart",false],["experimental-features-http3","network.http.http3.enabled",true],["experimental-features-media-avif","image.avif.enabled",false],["experimental-features-multi-pip","media.videocontrols.picture-in-picture.allow-multiple",true],["experimental-features-ime-search","browser.urlbar.keepPanelOpenDuringImeComposition",false],["experimental-features-web-api-inputmode","dom.forms.inputmode",true],["experimental-features-web-gpu2","dom.webgpu.enabled",false],["experimental-features-webrtc-global-mute-toggles","privacy.webrtc.globalMuteToggles",false]],"addons":[{"name":"PageLoader extension","type":"extension","version":"1.1","isActive":true,"id":"pageloader@mozilla.org"},{"name":"Tabswitch Talos Test","type":"extension","version":"0.1","isActive":true,"id":"tabswitch-talos@mozilla.org"},{"name":"Talos Powers","type":"extension","version":"1.1","isActive":true,"id":"talos-powers@mozilla.org"}],"features":[{"name":"DoH Roll-Out","version":"2.0.0","id":"doh-rollout@mozilla.org"},{"name":"Firefox Screenshots","version":"39.0.1","id":"screenshots@mozilla.org"},{"name":"Form Autofill","version":"1.0.1","id":"formautofill@mozilla.org"},{"name":"Picture-In-Picture","version":"1.0.0","id":"pictureinpicture@mozilla.org"},{"name":"Web Compatibility Interventions","version":"22.0.0","id":"webcompat@mozilla.org"},{"name":"WebCompat Reporter","version":"1.4.1","id":"webcompat-reporter@mozilla.org"}],"normandy":{"addonStudies":[],"prefRollouts":[],"prefStudies":[]}}
[task 2021-04-23T15:10:41.922Z] 15:10:41    ERROR -  JavaScript error: moz-extension://dfb83a0c-b826-4ea2-98f4-2603b45988e2/content/tabswitch-content-process.js, line 17: TypeError: can't access property "getURL", extensionPolicy is null
[task 2021-04-23T15:10:42.041Z] 15:10:42     INFO -  *** UTM:SVC TimerManager:registerTimer called after profile-before-change notification. Ignoring timer registration for id: recipe-client-addon-run
[task 2021-04-23T15:10:42.052Z] 15:10:42     INFO -  JavaScript error: resource:///modules/Discovery.jsm, line 104: NS_ERROR_NOT_AVAILABLE: Component returned failure code: 0x80040111 (NS_ERROR_NOT_AVAILABLE) [nsICookieManager.remove]
[task 2021-04-23T15:10:42.221Z] 15:10:42     INFO -  ###!!! [Child][RunMessage] Error: Channel closing: too late to send/recv, messages will be lost
[task 2021-04-23T15:10:42.467Z] 15:10:42     INFO -  TEST-INFO | 5132: exit 0
[task 2021-04-23T15:10:42.478Z] 15:10:42     INFO -  Browser initialized.
[task 2021-04-23T15:10:42.478Z] 15:10:42     INFO -  Fission enabled: False
[task 2021-04-23T15:10:42.729Z] 15:10:42     INFO -  Running cycle 1/1 for tabswitch test...
[task 2021-04-23T15:10:42.730Z] 15:10:42     INFO -  Using env: {'ALLUSERSPROFILE': 'C:\\ProgramData',
[task 2021-04-23T15:10:42.731Z] 15:10:42     INFO -   'APPDATA': 'C:\\Users\\task_1619187963\\AppData\\Roaming',
[task 2021-04-23T15:10:42.731Z] 15:10:42     INFO -   'COMMONPROGRAMFILES': 'C:\\Program Files\\Common Files',
[task 2021-04-23T15:10:42.731Z] 15:10:42     INFO -   'COMMONPROGRAMFILES(X86)': 'C:\\Program Files (x86)\\Common Files',
[task 2021-04-23T15:10:42.732Z] 15:10:42     INFO -   'COMMONPROGRAMW6432': 'C:\\Program Files\\Common Files',
[task 2021-04-23T15:10:42.732Z] 15:10:42     INFO -   'COMPUTERNAME': 'T-W1064-MS-114',
[task 2021-04-23T15:10:42.732Z] 15:10:42     INFO -   'COMSPEC': 'C:\\windows\\system32\\cmd.exe',
[task 2021-04-23T15:10:42.733Z] 15:10:42     INFO -   'DRIVERDATA': 'C:\\Windows\\System32\\Drivers\\DriverData',
[task 2021-04-23T15:10:42.733Z] 15:10:42     INFO -   'EXTRA_MOZHARNESS_CONFIG': '{"installer_url": '
[task 2021-04-23T15:10:42.734Z] 15:10:42     INFO -                              '"https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/TtAfwEDSSgWvJS2vEn1jHA/artifacts/public/build/target.zip", '
[task 2021-04-23T15:10:42.734Z] 15:10:42     INFO -                              '"test_packages_url": '
[task 2021-04-23T15:10:42.734Z] 15:10:42     INFO -                              '"https://firefox-ci-tc.services.mozilla.com/api/queue/v1/task/TtAfwEDSSgWvJS2vEn1jHA/artifacts/public/build/target.test_packages.json"}',
[task 2021-04-23T15:10:42.735Z] 15:10:42     INFO -   'GECKO_HEAD_REPOSITORY': 'https://hg.mozilla.org/integration/autoland',
[task 2021-04-23T15:10:42.735Z] 15:10:42     INFO -   'GECKO_HEAD_REV': '20dcaf4ea49b64dbd1645e221b1d3cc13e06623a',
[task 2021-04-23T15:10:42.735Z] 15:10:42     INFO -   'HG_CACHE': 'C:\\tooltool-cache',
[task 2021-04-23T15:10:42.736Z] 15:10:42     INFO -   'HOMEDRIVE': 'C:',
[task 2021-04-23T15:10:42.736Z] 15:10:42     INFO -   'HOMEPATH': '\\Users\\task_1619187963',
[task 2021-04-23T15:10:42.737Z] 15:10:42     INFO -   'LD_LIBRARY_PATH': 'C:\\Users\\task_1619187963\\build\\application\\firefox',
[task 2021-04-23T15:10:42.737Z] 15:10:42     INFO -   'LOCALAPPDATA': 'C:\\Users\\task_1619187963\\AppData\\Local',
[task 2021-04-23T15:10:42.737Z] 15:10:42     INFO -   'LOGONSERVER': '\\\\T-W1064-MS-114',
[task 2021-04-23T15:10:42.738Z] 15:10:42     INFO -   'MINIDUMP_SAVE_PATH': 'C:\\Users\\task_1619187963\\build\\blobber_upload_dir',
[task 2021-04-23T15:10:42.738Z] 15:10:42     INFO -   'MINIDUMP_STACKWALK': 'C:/Users/task_1619187963/fetches\\minidump_stackwalk\\minidump_stackwalk.exe',
[task 2021-04-23T15:10:42.738Z] 15:10:42     INFO -   'MOZILLABUILD': 'C:\\mozilla-build',
[task 2021-04-23T15:10:42.739Z] 15:10:42     INFO -   'MOZ_ACCELERATED': '1',
[task 2021-04-23T15:10:42.739Z] 15:10:42     INFO -   'MOZ_AUTOMATION': '1',
[task 2021-04-23T15:10:42.739Z] 15:10:42     INFO -   'MOZ_CRASHREPORTER': '1',
[task 2021-04-23T15:10:42.739Z] 15:10:42     INFO -   'MOZ_CRASHREPORTER_NO_REPORT': '1',
[task 2021-04-23T15:10:42.740Z] 15:10:42     INFO -   'MOZ_DISABLE_NONLOCAL_CONNECTIONS': '1',
[task 2021-04-23T15:10:42.740Z] 15:10:42     INFO -   'MOZ_FETCHES': '[{"artifact": "public/build/fix-stacks.tar.bz2", "extract": '
[task 2021-04-23T15:10:42.741Z] 15:10:42     INFO -                  'true, "task": "fC6pDvpxTRivBDLufoLppg"}, {"artifact": '
[task 2021-04-23T15:10:42.741Z] 15:10:42     INFO -                  '"public/build/minidump_stackwalk.tar.xz", "extract": true, '
[task 2021-04-23T15:10:42.741Z] 15:10:42     INFO -                  '"task": "eBs3s3aQRQ6UmPewIBoh5Q"}]',
[task 2021-04-23T15:10:42.742Z] 15:10:42     INFO -   'MOZ_FETCHES_DIR': 'C:/Users/task_1619187963/fetches',
[task 2021-04-23T15:10:42.742Z] 15:10:42     INFO -   'MOZ_SCM_LEVEL': '3',
[task 2021-04-23T15:10:42.742Z] 15:10:42     INFO -   'MOZ_UPLOAD_DIR': 'C:\\Users\\task_1619187963\\build\\blobber_upload_dir',
[task 2021-04-23T15:10:42.743Z] 15:10:42     INFO -   'MOZ_USE_PAGELOADER': '1',
[task 2021-04-23T15:10:42.743Z] 15:10:42     INFO -   'MOZ_WEBRENDER': '1',
[task 2021-04-23T15:10:42.743Z] 15:10:42     INFO -   'NO_EM_RESTART': '1',
[task 2021-04-23T15:10:42.743Z] 15:10:42     INFO -   'NUMBER_OF_PROCESSORS': '8',
[task 2021-04-23T15:10:42.744Z] 15:10:42     INFO -   'ONEDRIVE': 'C:\\Users\\task_1619187963\\OneDrive',
[task 2021-04-23T15:10:42.744Z] 15:10:42     INFO -   'OS': 'Windows_NT',
[task 2021-04-23T15:10:42.745Z] 15:10:42     INFO -   'PATH': 'C:\\Users\\task_1619187963\\build\\venv\\Scripts;C:\\windows\\system32;C:\\windows;C:\\windows\\System32\\Wbem;C:\\windows\\System32\\WindowsPowerShell\\v1.0\\;C:\\windows\\System32\\OpenSSH\\;C:\\Program '
[task 2021-04-23T15:10:42.745Z] 15:10:42     INFO -           'Files\\Puppet Labs\\Puppet\\bin;C:\\Program '
[task 2021-04-23T15:10:42.745Z] 15:10:42     INFO -           'Files\\Mellanox\\MLNX_VPI\\IB\\Tools;C:\\Program '
[task 2021-04-23T15:10:42.746Z] 15:10:42     INFO -           'Files\\Mellanox\\MLNX_CIMProvider\\lib\\mft;C:\\Program '
[task 2021-04-23T15:10:42.746Z] 15:10:42     INFO -           'Files\\Git\\cmd;C:\\Program Files (x86)\\GNU\\GnuPG\\pub;C:\\Program '
[task 2021-04-23T15:10:42.746Z] 15:10:42     INFO -           'Files\\Mercurial\\;C:\\Program '
[task 2021-04-23T15:10:42.747Z] 15:10:42     INFO -           'Files\\Mercurial;C:\\mozilla-build\\bin;C:\\mozilla-build\\kdiff;C:\\mozilla-build\\moztools-x64\\bin;C:\\mozilla-build\\mozmake;C:\\mozilla-build\\nsis-3.01;C:\\mozilla-build\\python;C:\\mozilla-build\\python\\Scripts;C:\\mozilla-build\\python3;C:\\mozilla-build\\msys\\bin;C:\\mozilla-build\\msys\\local\\bin;C:\\Program '
[task 2021-04-23T15:10:42.747Z] 15:10:42     INFO -           'Files (x86)\\Windows Kits\\10\\Windows Performance '
[task 2021-04-23T15:10:42.748Z] 15:10:42     INFO -           'Toolkit\\;C:\\Users\\task_1619187963\\AppData\\Local\\Microsoft\\WindowsApps',
[task 2021-04-23T15:10:42.748Z] 15:10:42     INFO -   'PATHEXT': '.COM;.EXE;.BAT;.CMD;.VBS;.VBE;.JS;.JSE;.WSF;.WSH;.MSC',
[task 2021-04-23T15:10:42.748Z] 15:10:42     INFO -   'PIP_DOWNLOAD_CACHE': 'C:\\pip-cache',
[task 2021-04-23T15:10:42.749Z] 15:10:42     INFO -   'PROCESSOR_ARCHITECTURE': 'AMD64',
[task 2021-04-23T15:10:42.749Z] 15:10:42     INFO -   'PROCESSOR_IDENTIFIER': 'Intel64 Family 6 Model 94 Stepping 3, GenuineIntel',
[task 2021-04-23T15:10:42.749Z] 15:10:42     INFO -   'PROCESSOR_LEVEL': '6',
[task 2021-04-23T15:10:42.750Z] 15:10:42     INFO -   'PROCESSOR_REVISION': '5e03',
[task 2021-04-23T15:10:42.750Z] 15:10:42     INFO -   'PROGRAMDATA': 'C:\\ProgramData',
[task 2021-04-23T15:10:42.750Z] 15:10:42     INFO -   'PROGRAMFILES': 'C:\\Program Files',
[task 2021-04-23T15:10:42.750Z] 15:10:42     INFO -   'PROGRAMFILES(X86)': 'C:\\Program Files (x86)',
[task 2021-04-23T15:10:42.751Z] 15:10:42     INFO -   'PROGRAMW6432': 'C:\\Program Files',
[task 2021-04-23T15:10:42.751Z] 15:10:42     INFO -   'PROMPT': '$P$G',
[task 2021-04-23T15:10:42.751Z] 15:10:42     INFO -   'PSMODULEPATH': '%ProgramFiles%\\WindowsPowerShell\\Modules;C:\\windows\\system32\\WindowsPowerShell\\v1.0\\Modules;C:\\Program '
[task 2021-04-23T15:10:42.751Z] 15:10:42     INFO -                   'Files\\Mellanox\\MLNX_VPI\\Tools\\WMI\\Modules;C:\\Program '
[task 2021-04-23T15:10:42.752Z] 15:10:42     INFO -                   'Files\\Mellanox\\MLNX_CIMProvider\\WMI\\Modules',
[task 2021-04-23T15:10:42.752Z] 15:10:42     INFO -   'PUBLIC': 'C:\\Users\\Public',
[task 2021-04-23T15:10:42.752Z] 15:10:42     INFO -   'PYTHON': 'c:\\mozilla-build\\python3\\python3.exe',
[task 2021-04-23T15:10:42.753Z] 15:10:42     INFO -   'PYTHONPATH': 'C:\\Users\\task_1619187963\\build\\tests\\talos',
[task 2021-04-23T15:10:42.753Z] 15:10:42     INFO -   'RUST_BACKTRACE': 'full',
[task 2021-04-23T15:10:42.753Z] 15:10:42     INFO -   'SCCACHE_DISABLE': '1',
[task 2021-04-23T15:10:42.753Z] 15:10:42     INFO -   'STYLO_FORCE_ENABLED': '1',
[task 2021-04-23T15:10:42.753Z] 15:10:42     INFO -   'SYSTEMDRIVE': 'C:',
[task 2021-04-23T15:10:42.754Z] 15:10:42     INFO -   'SYSTEMROOT': 'C:\\windows',
[task 2021-04-23T15:10:42.754Z] 15:10:42     INFO -   'TASKCLUSTER_ROOT_URL': 'https://firefox-ci-tc.services.mozilla.com',
[task 2021-04-23T15:10:42.754Z] 15:10:42     INFO -   'TASK_ID': 'EBIAd9oySt6e2AO8ZIzNyg',
[task 2021-04-23T15:10:42.754Z] 15:10:42     INFO -   'TASK_STOP_TIME': '1619190282',
[task 2021-04-23T15:10:42.755Z] 15:10:42     INFO -   'TEMP': 'C:\\Users\\task_1619187963\\AppData\\Local\\Temp',
[task 2021-04-23T15:10:42.755Z] 15:10:42     INFO -   'TMP': 'C:\\Users\\task_1619187963\\AppData\\Local\\Temp',
[task 2021-04-23T15:10:42.755Z] 15:10:42     INFO -   'TOOLTOOL_CACHE': 'C:\\builds\\tooltool_cache',
[task 2021-04-23T15:10:42.756Z] 15:10:42     INFO -   'USERDOMAIN': 'T-W1064-MS-114',
[task 2021-04-23T15:10:42.756Z] 15:10:42     INFO -   'USERDOMAIN_ROAMINGPROFILE': 'T-W1064-MS-114',
[task 2021-04-23T15:10:42.756Z] 15:10:42     INFO -   'USERNAME': 'task_1619187963',
[task 2021-04-23T15:10:42.756Z] 15:10:42     INFO -   'USERPROFILE': 'C:\\Users\\task_1619187963',
[task 2021-04-23T15:10:42.757Z] 15:10:42     INFO -   'VIRTUAL_ENV': 'C:\\Users\\task_1619187963\\build\\venv',
[task 2021-04-23T15:10:42.757Z] 15:10:42     INFO -   'WINDIR': 'C:\\windows'}
[task 2021-04-23T15:10:42.757Z] 15:10:42     INFO -  TEST-INFO | started process 6380 (C:\Users\task_1619187963\build\application\firefox\firefox -wait-for-browser -no-deelevate -profile C:\Users\task_1619187963\AppData\Local\Temp\tmphqbp22ij\profile)```