Log for Custom FF Build (with proper fission prefs set)

fission_prefs_log.txt

1657297469415   RemoteAgent     DEBUG   WebDriver BiDi enabled
1657297469418   RemoteAgent     DEBUG   CDP enabled
[Parent 2148, Main Thread] WARNING: NS_ENSURE_SUCCESS_VOID(rv) failed with result 0x8000FFFF (NS_ERROR_UNEXPECTED): file /builds/worker/checkouts/gecko/toolkit/xre/nsAppRunner.cpp:2541
1657297469424   RemoteAgent     TRACE   Received observer notification final-ui-startup
WebDriver BiDi listening on ws://localhost:51959
1657297469434   RemoteAgent     DEBUG   Setting recommended pref browser.safebrowsing.passwords.enabled to false
1657297469439   RemoteAgent     DEBUG   Setting recommended pref browser.tabs.warnOnClose to false
1657297469442   RemoteAgent     DEBUG   Setting recommended pref datareporting.policy.dataSubmissionPolicyAccepted to false
1657297469447   RemoteAgent     DEBUG   Setting recommended pref dom.ipc.reportProcessHangs to false
1657297469450   RemoteAgent     DEBUG   Setting recommended pref dom.max_chrome_script_run_time to 0
1657297469454   RemoteAgent     DEBUG   Setting recommended pref network.http.prompt-temp-redirect to false
1657297469457   RemoteAgent     DEBUG   Setting recommended pref privacy.trackingprotection.enabled to false
1657297469460   RemoteAgent     DEBUG   Setting recommended pref startup.homepage_welcome_url.additional to
1657297469463   RemoteAgent     DEBUG   Setting recommended pref browser.contentblocking.features.standard to -tp,tpPrivate,cookieBehavior0,-cm,-fp
1657297469468   RemoteAgent     DEBUG   Setting recommended pref network.cookie.cookieBehavior to 0
1657297469472   CDP     INFO    Entered watchForTabs
1657297469474   CDP     INFO    Registered tab observer
1657297469475   CDP     INFO    Start Tab listener
1657297469477   CDP     INFO    Register existing: true
1657297469520   CDP     DEBUG   Waiting for initial application window
[Parent 2148, Main Thread] WARNING: NS_ENSURE_TRUE(mPresShell) failed: file /builds/worker/checkouts/gecko/layout/generic/nsFrameSelection.cpp:1600
[Parent 2148, Main Thread] WARNING: NS_ENSURE_TRUE(mPresShell) failed: file /builds/worker/checkouts/gecko/layout/generic/nsFrameSelection.cpp:1600
EMITTING: emit(featureUpdate:urlbar, pref-updated) from _emitFeatureUpdate() -> resource://nimbus/lib/ExperimentStore.jsm:375
EMITTING: emit(featureUpdate:urlbar, pref-updated) from _emitFeatureUpdate() -> resource://nimbus/lib/ExperimentStore.jsm:375
[Parent 2148, Main Thread] WARNING: NS_ENSURE_TRUE(mPresShell) failed: file /builds/worker/checkouts/gecko/layout/generic/nsFrameSelection.cpp:1600
EMITTING: emit(ADD_SECTION, topstories, [object Object]) from addSection() -> resource://activity-stream/lib/SectionsManager.jsm:271
[Parent 2148, Main Thread] WARNING: Failed to retarget HTML data delivery to the parser thread.: file /builds/worker/checkouts/gecko/parser/html/nsHtml5StreamParser.cpp:1234
EMITTING: emit(ADD_SECTION, highlights, [object Object]) from addSection() -> resource://activity-stream/lib/SectionsManager.jsm:271
EMITTING: emit(INIT) from init() -> resource://activity-stream/lib/SectionsManager.jsm:215
EMITTING: emit(UPDATE_SECTION, topstories, [object Object], true, true) from updateSection() -> resource://activity-stream/lib/SectionsManager.jsm:301
EMITTING: emit(ENABLE_SECTION, topstories) from enableSection() -> resource://activity-stream/lib/SectionsManager.jsm:279
1657297471441   RemoteAgent     TRACE   Received observer notification browser-idle-startup-tasks-finished
EMITTING: emit(target-created, [object MainProcessTarget]) from registerTarget() -> chrome://remote/content/cdp/targets/TargetList.jsm:104
DevTools listening on ws://localhost:51959/devtools/browser/2c832f08-647a-4b12-9cd3-b276810e6469

// Executed 'find-targets.js' script here

1657297479856   RemoteAgent     DEBUG   CDPConnection 7f4ad3eb-324a-47cb-a97b-49e0dc0d6b67 accepted
EMITTING: emit(packet, [object Object]) from onMessage() -> chrome://remote/content/server/WebSocketTransport.jsm:89
1657297479868   CDP     TRACE   CDPConnection 7f4ad3eb-324a-47cb-a97b-49e0dc0d6b67 -> {"id":1,"method":"Target.getTargets","params":{}}
1657297479876   CDP     TRACE   CDPConnection 7f4ad3eb-324a-47cb-a97b-49e0dc0d6b67 <- {"id":1,"result":{"targetInfos":[]}}
EMITTING: emit(send, [object Object]) from send() -> chrome://remote/content/server/WebSocketTransport.jsm:42