In JS console I see warnings:

Media resource blob:https://www.youtube.com/6f953976-1a87-4873-8ab1-e2931f20c381 could not be decoded.
This error message will be blank when privacy.resistFingerprinting = true. If it is really necessary, please add it to the whitelist in MediaError::GetMessage: NS_ERROR_DOM_MEDIA_DECODE_ERR (0x806e0004) - virtual void mozilla::GMPVideoDecoder::Error(GMPErr): GMPErr:7

Gentoo Linux.

{
"application": {
"name": "Firefox",
"osVersion": "Linux 6.6.30-gentoo+ #4 SMP PREEMPT_DYNAMIC Fri Jun 21 09:12:52 +04 2024",
"version": "127.0.1",
"buildID": "20240620160313",
"distributionID": "",
"userAgent": "Mozilla/5.0 (X11; Linux x86_64; rv:127.0) Gecko/20100101 Firefox/127.0",
"safeMode": false,
"memorySizeBytes": 16603983872,
"diskAvailableBytes": 2497918418944,
"supportURL": "https://support.mozilla.org/1/firefox/127.0.1/Linux/en-US/",
"osTheme": "Adwaita / Adwaita",
"numTotalWindows": 1,
"numFissionWindows": 1,
"numRemoteWindows": 1,
"fissionAutoStart": true,
"fissionDecisionStatus": "enabledByDefault",
"remoteAutoStart": true,
"policiesStatus": 1,
"keyLocationServiceGoogleFound": true,
"keySafebrowsingGoogleFound": true,
"keyMozillaFound": true
},
"securitySoftware": {
"registeredAntiVirus": "",
"registeredAntiSpyware": "",
"registeredFirewall": ""
},
"environmentVariables": {
"MOZ_ALLOW_DOWNGRADE": "1",
"MOZ_GMP_PATH": "/usr/lib64/nsbrowser/plugins/gmp-gmpopenh264/system-installed",
"MOZ_APP_LAUNCHER": "/usr/bin/firefox",
"DISPLAY": ":0",
"MOZ_USE_XINPUT2": "1",
"MOZ_PLUGIN_PATH": "/usr/lib64/mozilla/plugins",
"MOZ_ASSUME_USER_NS": "1",
"MOZ_LAUNCHED_CHILD": "",
"MOZ_APP_SILENT_START": "",
"XRE_PROFILE_PATH": "",
"XRE_PROFILE_LOCAL_PATH": "",
"XRE_START_OFFLINE": "",
"XRE_BINARY_PATH": "",
"XRE_RESTARTED_BY_PROFILE_MANAGER": ""
},
"modifiedPreferences": {
"accessibility.force_disabled": 1,
"accessibility.typeaheadfind.flashBar": 0,
"browser.contentblocking.category": "standard",
"browser.display.background_color": "#ffffff",
"browser.display.background_color.dark": "#000000",
"browser.display.use_system_colors": true,
"browser.download.useDownloadDir": false,
"browser.search.region": "GE",
"browser.search.suggest.enabled": false,
"browser.sessionstore.upgradeBackup.latestBuildID": "20240620160313",
"browser.sessionstore.restore_pinned_tabs_on_demand": true,
"browser.sessionstore.warnOnQuit": true,
"browser.startup.homepage_override.mstone": "127.0.1",
"browser.startup.homepage_override.buildID": "20240620160313",
"browser.startup.page": 3,
"browser.tabs.inTitlebar": 0,
"browser.toolbars.bookmarks.visibility": "never",
"browser.urlbar.tipShownCount.searchTip_onboard": 4,
"browser.urlbar.tipShownCount.searchTip_redirect": 4,
"browser.urlbar.tabToSearch.onboard.interactionsLeft": 0,
"browser.urlbar.quicksuggest.migrationVersion": 2,
"browser.urlbar.resultGroups": "{"children":[{"maxResultCount":1,"children":[{"group":"heuristicTest"},{"group":"heuristicExtension"},{"group":"heuristicSearchTip"},{"group":"heuristicOmnibox"},{"group":"heuristicEngineAlias"},{"group":"heuristicBookmarkKeyword"},{"group":"heuristicAutofill"},{"group":"heuristicPreloaded"},{"group":"heuristicTokenAliasEngine"},{"group":"heuristicFallback"}]},{"group":"extension","availableSpan":5},{"flexChildren":true,"children":[{"children":[{"flexChildren":true,"children":[{"flex":2,"group":"formHistory"},{"flex":4,"group":"remoteSuggestion"}]},{"group":"tailSuggestion"}],"flex":2},{"group":"generalParent","children":[{"availableSpan":3,"group":"inputHistory"},{"flexChildren":true,"children":[{"flex":1,"group":"remoteTab"},{"flex":2,"group":"general"},{"flex":2,"group":"aboutPages"},{"flex":1,"group":"preloaded"}]},{"group":"inputHistory"}],"flex":1}]}]}",
"browser.urlbar.placeholderName": "DuckDuckGo",
"browser.urlbar.recentsearches.lastDefaultChanged": "1713620856619",
"browser.urlbar.placeholderName.private": "DuckDuckGo",
"browser.urlbar.suggest.history": false,
"browser.urlbar.quicksuggest.scenario": "history",
"doh-rollout.home-region": "BY",
"doh-rollout.balrog-migration-done": true,
"doh-rollout.doneFirstRun": true,
"extensions.formautofill.creditCards.reauth.optout": "MDIEEPgAAAAAAAAAAAAAAAAAAAEwFAYIKoZIhvcNAwcECJsyd8MFFN9oBAhr1+TVwQ7Z8g==",
"extensions.formautofill.creditCards.used": 3,
"extensions.lastAppVersion": "127.0.1",
"font.name.monospace.x-western": "FiraCode Nerd Font Mono",
"general.autoScroll": true,
"gfx.blacklist.accelerated-canvas2d.failureid": "FEATURE_FAILURE_DL_BLOCKLIST_NO_ID",
"gfx.blacklist.vaapi": 4,
"gfx.blacklist.vaapi.failureid": "FEATURE_FAILURE_VAAPI_TEST_FAILED",
"gfx.blacklist.webrender.failureid": "FEATURE_FAILURE_DDX_INTEL",
"gfx.webrender.all": true,
"gfx.x11-egl.force-enabled": true,
"idle.lastDailyNotification": 1719208792,
"layers.acceleration.disabled": true,
"layers.acceleration.force-enabled": true,
"media.gmp-widevinecdm.hashValue": "55a7e4b379d5826f01b1a36abd872f411b0ba3cd2edec0c799e82def02f171df1e33365f58d91d2527f1dcaf3644b0ba9f5c4a31e712bee42bc786a545a3491c",
"media.gmp-gmpopenh264.lastUpdate": 1705783159,
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"media.gmp-gmpopenh264.lastDownloadFailReason": "Error: Failed downloading via ServiceRequest, status: 0, channelStatus: 2152398878, errorCode: 2, reason: error",
"media.gmp-manager.lastCheck": 1719207868,
"media.gmp-widevinecdm.version": "4.10.2557.0",
"media.gmp-gmpopenh264.abi": "x86_64-gcc3",
"media.gmp-gmpopenh264.hashValue": "53a58bfb4c8124ad4f7655b99bfdea290033a085e0796b19245b33b91c0948fdac9f0c3e817130b352493a65d9a7a0fc8a7c1eedc618cdaa2b4580734a11cd9c",
"media.gmp-widevinecdm.abi": "x86_64-gcc3",
"media.benchmark.vp9.fps": 46,
"media.benchmark.vp9.versioncheck": 5,
"media.eme.enabled": true,
"media.gmp-gmpopenh264.enabled": false,
"media.gmp-gmpopenh264.lastDownload": 1705783159,
"media.gmp-gmpopenh264.lastDownloadFailed": 1716569195,
"media.gmp-gmpopenh264.lastInstallStart": 1716569195,
"media.gmp-gmpopenh264.version": "2.3.2",
"media.gmp-manager.lastEmptyCheck": 1719207868,
"media.gmp-widevinecdm.lastDownload": 1680295955,
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"media.gmp-widevinecdm.lastUpdate": 1680295955,
"media.gmp.storage.version.observed": 1,
"media.rdd-process.enabled": false,
"media.videocontrols.picture-in-picture.video-toggle.enabled": false,
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"media.webspeech.synth.dont_notify_on_error": true,
"mousewheel.min_line_scroll_amount": 1,
"network.dns.disablePrefetch": true,
"network.http.speculative-parallel-limit": 0,
"network.predictor.enabled": false,
"network.prefetch-next": false,
"network.trr.blocklist_cleanup_done": true,
"places.database.lastMaintenance": 1718670196,
"privacy.purge_trackers.last_purge": "1719208795944",
"privacy.purge_trackers.date_in_cookie_database": "0",
"privacy.sanitize.pending": "[{"id":"newtab-container","itemsToClear":[],"options":{}}]",
"privacy.restrict3rdpartystorage.rollout.enabledByDefault": false,
"privacy.restrict3rdpartystorage.rollout.preferences.TCPToggleInStandard": true,
"privacy.userContext.ui.enabled": true,
"security.sandbox.plugin.tempDirSuffix": "a42de2f6-7df1-451f-b7da-e6c24f7c357a",
"security.remote_settings.crlite_filters.checked": 1656692847,
"security.remote_settings.intermediates.checked": 1656692847,
"security.sandbox.content.tempDirSuffix": "4aa88f1b-c33b-4b04-ac80-e75dabb6abc6",
"services.sync.declinedEngines": "addons",
"services.sync.lastPing": 1719189700,
"services.sync.lastSync": "Mon Jun 24 2024 21:37:24 GMT+0400 (Georgia Standard Time)",
"services.sync.engine.addons": false,
"services.sync.engine.creditcards": true,
"services.sync.engine.prefs.modified": false,
"signon.management.page.os-auth.optout": "MDIEEPgAAAAAAAAAAAAAAAAAAAEwFAYIKoZIhvcNAwcECMUzGUHdKSEHBAhqEGig1RQgPw==",
"signon.firefoxRelay.feature": "offered",
"storage.vacuum.last.places.sqlite": 1717937352,
"storage.vacuum.last.content-prefs.sqlite": 1718670187,
"storage.vacuum.last.index": 2,
"webgl.disabled": true
},
"lockedPreferences": {
"fission.autostart.session": true
},
"printingPreferences": {
"print_printer": "Mozilla Save to PDF"
},
"media": {
"currentAudioBackend": "pulse-rust",
"currentMaxAudioChannels": 2,
"currentPreferredSampleRate": 44100,
"audioOutputDevices": [
{
"name": "Built-in Audio Analog Stereo",
"groupId": "/devices/pci0000:00/0000:00:1b.0/sound/card0",
"vendor": "Intel Corporation",
"type": 2,
"state": 2,
"preferred": 15,
"supportedFormat": 12336,
"defaultFormat": 16,
"maxChannels": 2,
"defaultRate": 48000,
"maxRate": 384000,
"minRate": 1,
"maxLatency": 0,
"minLatency": 0
}
],
"audioInputDevices": [
{
"name": "Monitor of Built-in Audio Analog Stereo",
"groupId": "/devices/pci0000:00/0000:00:1b.0/sound/card0",
"vendor": "Intel Corporation",
"type": 1,
"state": 2,
"preferred": 0,
"supportedFormat": 12336,
"defaultFormat": 16,
"maxChannels": 2,
"defaultRate": 48000,
"maxRate": 384000,
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"maxLatency": 0,
"minLatency": 0
},
{
"name": "Built-in Audio Analog Stereo",
"groupId": "/devices/pci0000:00/0000:00:1b.0/sound/card0",
"vendor": "Intel Corporation",
"type": 1,
"state": 2,
"preferred": 15,
"supportedFormat": 12336,
"defaultFormat": 16,
"maxChannels": 2,
"defaultRate": 44100,
"maxRate": 384000,
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"maxLatency": 0,
"minLatency": 0
}
],
"codecSupportInfo": "H264 SW HW\nVP9 SW\nVP8 SW\nAV1 SW\nHEVC NONE\nTheora NONE\nAAC SW\nMP3 SW\nOpus SW\nVorbis SW\nFLAC SW\nWave SW"
},
"accessibility": {
"isActive": false,
"forceDisabled": 1,
"instantiator": ""
},
"startupCache": {
"DiskCachePath": "/home/vitaly/.cache/mozilla/firefox/main/startupCache/startupCache.8.little",
"IgnoreDiskCache": false,
"FoundDiskCacheOnInit": true,
"WroteToDiskCache": false
},
"libraryVersions": {
"NSPR": {
"minVersion": "4.35",
"version": "4.35"
},
"NSS": {
"minVersion": "3.101",
"version": "3.101"
},
"NSSUTIL": {
"minVersion": "3.101",
"version": "3.101"
},
"NSSSSL": {
"minVersion": "3.101",
"version": "3.101"
},
"NSSSMIME": {
"minVersion": "3.101",
"version": "3.101"
}
},
"userJS": {
"exists": true
},
"intl": {
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"requested": [
"en-US-posix"
],
"available": [
"en-US"
],
"supported": [
"en-US"
],
"regionalPrefs": [
"en-US-posix"
],
"defaultLocale": "en-US"
},
"osPrefs": {
"systemLocales": [
"en-US-posix"
],
"regionalPrefsLocales": [
"en-US-posix"
]
}
},
"contentAnalysis": {
"active": false
},
"sandbox": {
"hasSeccompBPF": true,
"hasSeccompTSync": true,
"hasPrivilegedUserNamespaces": true,
"hasUserNamespaces": true,
"canSandboxContent": true,
"canSandboxMedia": true,
"syscallLog": [],
"contentSandboxLevel": 4,
"effectiveContentSandboxLevel": 4
},
"remoteAgent": {
"running": false,
"url": ""
},
"experimentalFeatures": [
[
"experimental-features-cookie-samesite-none-requires-secure2",
"network.cookie.sameSite.noneRequiresSecure",
false
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[
"experimental-features-css-masonry2",
"layout.css.grid-template-masonry-value.enabled",
false
],
[
"experimental-features-devtools-serviceworker-debugger-support",
"devtools.debugger.features.windowless-service-workers",
false
],
[
"experimental-features-media-jxl",
"image.jxl.enabled",
false
],
[
"experimental-features-ime-search",
"browser.urlbar.keepPanelOpenDuringImeComposition",
false
],
[
"experimental-features-web-gpu2",
"dom.webgpu.enabled",
false
],
[
"experimental-features-webrtc-global-mute-toggles",
"privacy.webrtc.globalMuteToggles",
false
]
],
"graphics": {
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"numTotalWindows": 1,
"numAcceleratedWindows": 1,
"windowLayerManagerType": "WebRender",
"windowLayerManagerRemote": true,
"graphicsDevicePixelRatios": [
1
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"adapterDescription": "Mesa Intel(R) HD Graphics 4000 (IVB GT2)",
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"adapterDeviceID": "0x0166",
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"adapterDrivers": "",
"driverVendor": "mesa/crocus",
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"driverDate": "",
"adapterVendorID2": "",
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"isGPU2Active": false,
"targetFrameRate": 60,
"windowProtocol": "x11",
"supportFontDetermination": "Linux Unknown - ID=gentooVERSION_ID="2.15"\n",
"webgl1Renderer": "WebGL is currently disabled.",
"webgl1Version": "-",
"webgl1DriverExtensions": "-",
"webgl1Extensions": "-",
"webgl1WSIInfo": "-",
"webgl2Renderer": "WebGL is currently disabled.",
"webgl2Version": "-",
"webgl2DriverExtensions": "-",
"webgl2Extensions": "-",
"webgl2WSIInfo": "-",
"info": {
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"AzureCanvasBackend": "skia",
"AzureContentBackend": "skia",
"ApzWheelInput": 1,
"ApzDragInput": 1,
"ApzKeyboardInput": 1,
"ApzAutoscrollInput": 1,
"ApzZoomingInput": 1,
"CMSOutputProfile": "Empty profile data",
"DisplayCount": 1,
"Display0": "1366x768@60Hz scales:1.000000|1.000000"
},
"failures": [
"[GFX1-]: GFX: CanvasTranslator failed creating WebGL shared context",
"[GFX1-]: GFX: CanvasTranslator failed creating WebGL shared context",
"[GFX1-]: GFX: CanvasTranslator failed creating WebGL shared context",
"[GFX1-]: GFX: CanvasTranslator failed creating WebGL shared context",
"[GFX1-]: GFX: CanvasTranslator failed creating WebGL shared context",
"[GFX1-]: GFX: CanvasTranslator failed creating WebGL shared context",
"[GFX1-]: GFX: CanvasTranslator failed creating WebGL shared context"
],
"indices": [
0,
1,
2,
3,
4,
5,
6
],
"featureLog": {
"features": [
{
"name": "HW_COMPOSITING",
"description": "Compositing",
"status": "force_enabled",
"log": [
{
"type": "default",
"status": "available"
},
{
"type": "user",
"status": "force_enabled",
"message": "Force-enabled by pref"
}
]
},
{
"name": "OPENGL_COMPOSITING",
"description": "OpenGL Compositing",
"status": "force_enabled",
"log": [
{
"type": "default",
"status": "available"
},
{
"type": "user",
"status": "force_enabled",
"message": "Force-enabled by pref"
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]
},
{
"name": "WEBRENDER",
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"log": [
{
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{
"type": "user",
"status": "force_enabled",
"message": "Force enabled by pref"
},
{
"type": "env",
"status": "blocklisted",
"failureId": "FEATURE_FAILURE_DDX_INTEL",
"message": "Blocklisted by gfxInfo"
}
]
},
{
"name": "WEBRENDER_COMPOSITOR",
"description": "WebRender native compositor",
"status": "blocked",
"log": [
{
"type": "default",
"status": "disabled",
"failureId": "FEATURE_FAILURE_DISABLED",
"message": "Disabled by default"
},
{
"type": "env",
"status": "blocklisted",
"failureId": "FEATURE_FAILURE_WEBRENDER_COMPOSITOR_DISABLED",
"message": "Blocklisted by gfxInfo"
},
{
"type": "runtime",
"status": "blocked",
"failureId": "FEATURE_FAILURE_DISABLE_RELEASE_OR_BETA",
"message": "Cannot be enabled in release or beta"
}
]
},
{
"name": "WEBRENDER_PARTIAL",
"description": "WebRender partial present",
"status": "available",
"log": [
{
"type": "default",
"status": "available"
}
]
},
{
"name": "WEBRENDER_SHADER_CACHE",
"description": "WebRender shader disk cache",
"status": "disabled",
"log": [
{
"type": "default",
"status": "disabled",
"failureId": "FEATURE_FAILURE_DISABLED",
"message": "Disabled by default"
}
]
},
{
"name": "WEBRENDER_OPTIMIZED_SHADERS",
"description": "WebRender optimized shaders",
"status": "available",
"log": [
{
"type": "default",
"status": "available"
}
]
},
{
"name": "WEBRENDER_ANGLE",
"description": "WebRender ANGLE",
"status": "unavailable",
"log": [
{
"type": "default",
"status": "available"
},
{
"type": "env",
"status": "unavailable",
"failureId": "FEATURE_FAILURE_OS_NOT_SUPPORTED",
"message": "OS not supported"
}
]
},
{
"name": "WEBRENDER_DCOMP_PRESENT",
"description": "WebRender DirectComposition",
"status": "unavailable",
"log": [
{
"type": "default",
"status": "available"
},
{
"type": "user",
"status": "disabled",
"failureId": "FEATURE_FAILURE_DCOMP_PREF_DISABLED",
"message": "User disabled via pref"
},
{
"type": "env",
"status": "unavailable",
"failureId": "FEATURE_FAILURE_NO_GPU_PROCESS",
"message": "Requires GPU process"
},
{
"type": "runtime",
"status": "unavailable",
"failureId": "FEATURE_FAILURE_DCOMP_NOT_ANGLE",
"message": "Requires ANGLE"
}
]
},
{
"name": "WEBRENDER_SCISSORED_CACHE_CLEARS",
"description": "WebRender scissored cache clears",
"status": "available",
"log": [
{
"type": "default",
"status": "available"
}
]
},
{
"name": "WEBGPU",
"description": "WebGPU",
"status": "blocked",
"log": [
{
"type": "default",
"status": "available"
},
{
"type": "runtime",
"status": "blocked",
"failureId": "WEBGPU_DISABLE_RELEASE_OR_BETA",
"message": "WebGPU cannot be enabled in release or beta"
}
]
},
{
"name": "X11_EGL",
"description": "X11 EGL",
"status": "force_enabled",
"log": [
{
"type": "default",
"status": "available"
},
{
"type": "user",
"status": "force_enabled",
"message": "Force enabled by pref"
}
]
},
{
"name": "DMABUF",
"description": "DMABUF",
"status": "available",
"log": [
{
"type": "default",
"status": "available"
}
]
},
{
"name": "HARDWARE_VIDEO_DECODING",
"description": "Hardware video decoding",
"status": "available",
"log": [
{
"type": "default",
"status": "available"
}
]
},
{
"name": "HW_DECODED_VIDEO_ZERO_COPY",
"description": "Hardware decoded video zero copy",
"status": "available",
"log": [
{
"type": "default",
"status": "available"
}
]
},
{
"name": "VP8_HW_DECODE",
"description": "VP8 hardware decoding",
"status": "blocklisted",
"log": [
{
"type": "default",
"status": "available"
},
{
"type": "env",
"status": "blocklisted",
"failureId": "FEATURE_FAILURE_VIDEO_DECODING_MISSING",
"message": "#BLOCKLIST_FEATURE_FAILURE_VIDEO_DECODING_MISSING"
}
]
},
{
"name": "VP9_HW_DECODE",
"description": "VP9 hardware decoding",
"status": "blocklisted",
"log": [
{
"type": "default",
"status": "available"
},
{
"type": "env",
"status": "blocklisted",
"failureId": "FEATURE_FAILURE_VIDEO_DECODING_MISSING",
"message": "#BLOCKLIST_FEATURE_FAILURE_VIDEO_DECODING_MISSING"
}
]
},
{
"name": "DMABUF_SURFACE_EXPORT",
"description": "WebGL DMABuf surface export",
"status": "blocked",
"log": [
{
"type": "default",
"status": "blocked",
"failureId": "FEATURE_FAILURE_BROKEN_DRIVER",
"message": "Blocklisted by gfxInfo"
}
]
},
{
"name": "BACKDROP_FILTER",
"description": "Backdrop filter",
"status": "available",
"log": [
{
"type": "default",
"status": "available"
}
]
},
{
"name": "CANVAS_RENDERER_THREAD",
"description": "canvas renderer thread",
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"log": [
{
"type": "default",
"status": "available"
}
]
},
{
"name": "ACCELERATED_CANVAS2D",
"description": "Accelerated Canvas2D",
"status": "available",
"log": [
{
"type": "default",
"status": "available"
}
]
},
{
"name": "H264_HW_DECODE",
"description": "H.264 hardware decoding",
"status": "available",
"log": [
{
"type": "default",
"status": "available"
}
]
},
{
"name": "AV1_HW_DECODE",
"description": "AV1 hardware decoding",
"status": "blocklisted",
"log": [
{
"type": "default",
"status": "available"
},
{
"type": "env",
"status": "blocklisted",
"failureId": "FEATURE_FAILURE_VIDEO_DECODING_MISSING",
"message": "#BLOCKLIST_FEATURE_FAILURE_VIDEO_DECODING_MISSING"
}
]
},
{
"name": "REMOTE_CANVAS",
"description": "Remote canvas",
"status": "blocked",
"log": [
{
"type": "default",
"status": "disabled",
"failureId": "FEATURE_FAILURE_DISABLED",
"message": "Disabled via pref"
},
{
"type": "env",
"status": "unavailable-no-gpu-process",
"failureId": "FEATURE_REMOTE_CANVAS_NO_GPU_PROCESS",
"message": "Disabled without GPU process"
},
{
"type": "runtime",
"status": "blocked",
"failureId": "FEATURE_REMOTE_CANVAS_NOT_WINDOWS",
"message": "Platform not supported"
}
]
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Is privacy.resistFingerprinting set to true? If so, does turning it off fix the problem? If so, perhaps this is related to bug 1724663...

Based on the JS console message, moving to GMP component. Feel free to put it back if that seems wrong...

No, privacy.resistFingerprinting is false.

I started Firefox from terminal and reproduced the error (just open a YouTube video and scroll/seek it around 5 times) - in terminal I got:

[Child 26106, MediaDecoderStateMachine #1] WARNING: Decoder=7fb5e0775700 Decode error: NS_ERROR_DOM_MEDIA_FATAL_ERR (0x806e0005): file /var/tmp/portage/www-client/firefox-127.0.1/work/firefox-127.0.1/dom/media/MediaDecoderStateMachineBase.cpp:167
[26599] Sandbox: attempt to open unexpected file /sys/devices/system/cpu/cpu0/cache/index2/size
[26599] Sandbox: attempt to open unexpected file /sys/devices/system/cpu/cpu0/cache/index3/size
[26599] Sandbox: attempt to open unexpected file /sys/devices/system/cpu/present
[26599] Sandbox: attempt to open unexpected file /sys/devices/system/cpu/possible
[26599] Sandbox: attempt to open unexpected file /sys/devices/system/cpu/possible
[26599] Sandbox: attempt to open unexpected file /sys/devices/system/cpu/cpu0/topology/core_cpus
[26599] Sandbox: attempt to open unexpected file /sys/devices/system/cpu/cpu0/topology/thread_siblings

media.ffmpeg.vaapi.enabled was disabled, I tried with true - still crash.

Should I remain this property to true?

I'm going to leave this for the GMP triagers to address, as it's out of my area of expertise...

The severity field is not set for this bug.
:jimm, could you have a look please?

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