Bug 1440569

Summary: [e10s] Firefox: continually crashing tabs
Product: [Fedora] Fedora Reporter: Peter Gückel <pgueckel>
Component: firefoxAssignee: Martin Stransky <stransky>
Status: CLOSED WORKSFORME QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: high Docs Contact:
Priority: unspecified    
Version: 26CC: aahrend, gecko-bugs-nobody, jhorak, kengert, lijli, pjasicek, stransky, timo
Target Milestone: ---   
Target Release: ---   
Hardware: x86_64   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2017-12-31 05:49:21 UTC Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:

Description Peter Gückel 2017-04-10 01:08:22 UTC
Description of problem:
Gah. Your tab just crashed.

Version-Release number of selected component (if applicable):
52.0.2-2.fc25

How reproducible:


Steps to Reproduce:
1. surf to a page, such as: http://www.good-music-guide.com/community/index.php/topic,21492.89460.html
2. scroll down and, if necessary, scroll the previous or subsequent page(s) and, before long...
3. Gah.

Actual results:


Expected results:


Additional info:
This appears to be a new problem since firefox 52 came out. I have never seen this error before. Reloading the page causes a repeat. The pages work just fine in Google Chrome from the Google repo.

Comment 1 Martin Stransky 2017-04-10 07:58:28 UTC
Please try to set browser.tabs.remote.autostart to false in about:config.

Comment 2 Peter Gückel 2017-04-10 23:26:23 UTC
OK, I will give that a try later on. I installed Fedora 26 alpha last night onto a clean partition and I am using that now. The problem has not yet occurred in Fedora 26, not even on that very same site, even though I have not made the setting change you have indicated.

I will boot into Fedora 25 later on some time and give that a try and tell you what happened.

Comment 3 Peter Gückel 2017-04-11 02:32:43 UTC
Very strange! That setting is already set to the default of false! Even stranger, there is another entry immediately beneath that one, called browser.tabs.remote.autostart.2 and it is set to true and is user-set, but I never set such a thing (unless it is referring to me having disabled the suggested sites, which I DID disable)!

Comment 4 Martin Stransky 2017-04-11 08:20:12 UTC
browser.tabs.remote.autostart.2 is set by e10s rollout extension which enables e10s for selected users - which seems to be you :) Anyway, the e10s can be disabled. Can you please attach output of about:support? Thanks.

Comment 5 Martin Stransky 2017-04-11 08:29:57 UTC
You can force disable the e10s by browser.tabs.remote.force-disable pref. Go to about:config, right click and add a new boolean value.

Comment 6 Peter Gückel 2017-04-11 13:57:13 UTC
I think it might be smarter for me to wait with the output until the problem occurs on Fedora 26, since that is what I am using since Sunday night (~36 hours ago). I no longer use Fedora 25. I don't see much point in me rebooting into the old system that I no longer use to solve a problem that has not, as yet, affected me in the current OS that I will be using from now on.

Comment 7 Arne Ahrend 2017-04-12 20:33:06 UTC
I can confirm that the suggestion from comment #5 (adding boolean browser.tabs.remote.force-disable as true) solves the constant crashing on Javascript-heavy pages for me (youtube works again, as does shop.rossmann-fotowelt.de, a chemist's chain store offering photoprints).

Below is my about:support after applying comment #5:

{
  "application": {
    "name": "Firefox",
    "osVersion": "Linux 4.10.8-200.fc25.x86_64",
    "version": "52.0.2",
    "buildID": "20170403080404",
    "userAgent": "Mozilla/5.0 (X11; Fedora; Linux x86_64; rv:52.0) Gecko/20100101 Firefox/52.0",
    "safeMode": false,
    "supportURL": "https://support.mozilla.org/1/firefox/52.0.2/Linux/de/",
    "numTotalWindows": 1,
    "numRemoteWindows": 0,
    "remoteAutoStart": false,
    "autoStartStatus": 8
  },
  "modifiedPreferences": {
    "accessibility.typeaheadfind.flashBar": 0,
    "browser.cache.disk.smart_size.first_run": false,
    "browser.cache.disk.filesystem_reported": 1,
    "browser.cache.disk.capacity": 358400,
    "browser.cache.frecency_experiment": 3,
    "browser.cache.disk.smart_size.use_old_max": false,
    "browser.cache.disk.smart_size_cached_value": 358400,
    "browser.download.importedFromSqlite": true,
    "browser.download.useDownloadDir": false,
    "browser.fixup.domainwhitelist.hp4250dtn": true,
    "browser.places.smartBookmarksVersion": 8,
    "browser.search.useDBForOrder": true,
    "browser.sessionstore.upgradeBackup.latestBuildID": "20170403080404",
    "browser.startup.homepage_override.mstone": "52.0.2",
    "browser.startup.homepage": "about:blank",
    "browser.startup.homepage_override.buildID": "20170403080404",
    "browser.tabs.warnOnClose": false,
    "browser.tabs.remote.autostart.2": true,
    "browser.tabs.remote.force-disable": true,
    "browser.tabs.crashReporting.includeURL": true,
    "browser.urlbar.lastSuggestionsPromptDate": 20160822,
    "browser.urlbar.daysBeforeHidingSuggestionsPrompt": 0,
    "dom.apps.lastUpdate.buildID": "20160919122928",
    "dom.apps.lastUpdate.mstone": "49.0",
    "dom.apps.reset-permissions": true,
    "dom.w3c_touch_events.expose": false,
    "dom.mozApps.used": true,
    "extensions.lastAppVersion": "52.0.2",
    "font.name.serif.x-western": "sans-serif",
    "font.internaluseonly.changed": false,
    "gfx.crash-guard.glcontext.driverVersion": "3.0 Mesa 11.1.0 (git-525f3c2)",
    "gfx.crash-guard.glcontext.deviceID": "Mesa DRI Intel(R) HD Graphics 530 (Skylake GT2) ",
    "gfx.crash-guard.glcontext.appVersion": "45.0.2",
    "gfx.crash-guard.status.glcontext": 2,
    "media.webrtc.debug.log_file": "/tmp/WebRTC.log",
    "media.gmp-gmpopenh264.lastUpdate": 1472069372,
    "media.gmp-gmpopenh264.version": "1.6",
    "media.gmp-manager.lastCheck": 1492028475,
    "media.gmp.storage.version.observed": 1,
    "media.gmp-gmpopenh264.abi": "x86_64-gcc3",
    "media.gmp-manager.buildID": "20170403080404",
    "network.cookie.lifetimePolicy": 2,
    "network.predictor.cleaned-up": true,
    "network.cookie.prefsMigrated": true,
    "places.history.expiration.transient_current_max_pages": 122334,
    "places.database.lastMaintenance": 1491651237,
    "plugin.state.libgnome-shell-browser-plugin": 2,
    "plugin.importedState": true,
    "plugin.disable_full_page_plugin_for_types": "application/pdf",
    "print.tmp.printerfeatures.CUPS/hp4250dtn.paper.6.width_mm": 190,
    "print.tmp.printerfeatures.CUPS/hp4250dtn.paper.0.name": "A5",
    "print.tmp.printerfeatures.hp4250dtn.supports_paper_size_change": true,
    "print.tmp.printerfeatures.CUPS/hp4250dtn.supports_orientation_change": true,
    "print.tmp.printerfeatures.hp4250dtn.paper.2.name": "A3",
    "print.tmp.printerfeatures.hp4250dtn.paper.1.is_inch": false,
    "print.tmp.printerfeatures.CUPS/hp4250dtn.paper.0.height_mm": 210,
    "print.print_paper_width": "210,00",
    "print.tmp.printerfeatures.hp4250dtn.supports_spoolercommand_change": false,
    "print.print_paper_size_unit": 1,
    "print.print_to_file": false,
    "print.tmp.printerfeatures.hp4250dtn.can_change_resolution": false,
    "print.tmp.printerfeatures.CUPS/hp4250dtn.can_change_plex": false,
    "print.tmp.printerfeatures.hp4250dtn.resolution.0.name": "default",
    "print.tmp.printerfeatures.hp4250dtn.paper.0.height_mm": 210,
    "print.tmp.printerfeatures.CUPS/hp4250dtn.can_change_downloadfonts": false,
    "print.tmp.printerfeatures.hp4250dtn.can_change_spoolercommand": false,
    "print.print_footerright": "",
    "print.print_footerleft": "",
    "print.tmp.printerfeatures.hp4250dtn.supports_jobtitle_change": false,
    "print.tmp.printerfeatures.CUPS/hp4250dtn.resolution.0.name": "default",
    "print.tmp.printerfeatures.hp4250dtn.supports_printincolor_change": true,
    "print.tmp.printerfeatures.hp4250dtn.paper.0.width_mm": 148,
    "print.tmp.printerfeatures.CUPS/hp4250dtn.plex.0.name": "default",
    "print.print_orientation": 0,
    "print.tmp.printerfeatures.hp4250dtn.orientation.1.name": "landscape",
    "print.print_headerright": "",
    "print.print_margin_top": "0.5",
    "print.tmp.printerfeatures.hp4250dtn.supports_colorspace_change": false,
    "print.tmp.printerfeatures.CUPS/hp4250dtn.paper.2.height_mm": 420,
    "print.tmp.printerfeatures.CUPS/hp4250dtn.paper.4.name": "Legal",
    "print.tmp.printerfeatures.hp4250dtn.paper.3.height_mm": 279,
    "print.tmp.printerfeatures.hp4250dtn.paper.5.is_inch": true,
    "print.tmp.printerfeatures.hp4250dtn.supports_orientation_change": true,
    "print.tmp.printerfeatures.hp4250dtn.paper.count": 7,
    "print.print_resolution_name": "default",
    "print.tmp.printerfeatures.hp4250dtn.can_change_paper_size": true,
    "print.tmp.printerfeatures.CUPS/hp4250dtn.supports_plex_change": false,
    "print.tmp.printerfeatures.CUPS/hp4250dtn.resolution.count": 1,
    "print.tmp.printerfeatures.hp4250dtn.paper.4.is_inch": true,
    "print.tmp.printerfeatures.CUPS/hp4250dtn.supports_colorspace_change": false,
    "print.print_scaling": "  0,01",
    "print.tmp.printerfeatures.CUPS/hp4250dtn.can_change_orientation": true,
    "print.tmp.printerfeatures.CUPS/hp4250dtn.paper.5.is_inch": true,
    "print.tmp.printerfeatures.hp4250dtn.colorspace.count": 1,
    "print.print_unwriteable_margin_right": 25,
    "print.tmp.printerfeatures.CUPS/hp4250dtn.paper.3.is_inch": true,
    "print.tmp.printerfeatures.CUPS/hp4250dtn.supports_paper_size_change": true,
    "print.tmp.printerfeatures.hp4250dtn.can_change_jobtitle": false,
    "print.tmp.printerfeatures.hp4250dtn.paper.2.is_inch": false,
    "print.print_paper_height": "297,00",
    "print.tmp.printerfeatures.CUPS/hp4250dtn.orientation.count": 2,
    "print.print_unwriteable_margin_left": 25,
    "print.tmp.printerfeatures.hp4250dtn.paper.6.name": "Executive",
    "print.tmp.printerfeatures.CUPS/hp4250dtn.paper.5.height_mm": 431,
    "print.print_paper_data": 0,
    "print.tmp.printerfeatures.CUPS/hp4250dtn.paper.4.width_mm": 215,
    "print.print_plex_name": "default",
    "print.tmp.printerfeatures.CUPS/hp4250dtn.paper.2.name": "A3",
    "print.tmp.printerfeatures.hp4250dtn.paper.4.width_mm": 215,
    "print.tmp.printerfeatures.CUPS/hp4250dtn.paper.5.width_mm": 279,
    "print.tmp.printerfeatures.hp4250dtn.plex.0.name": "default",
    "print.tmp.printerfeatures.CUPS/hp4250dtn.paper.2.is_inch": false,
    "print.tmp.printerfeatures.CUPS/hp4250dtn.paper.4.height_mm": 355,
    "print.print_resolution": 1200,
    "print.tmp.printerfeatures.hp4250dtn.paper.5.height_mm": 431,
    "print.tmp.printerfeatures.CUPS/hp4250dtn.paper.6.height_mm": 254,
    "print.tmp.printerfeatures.CUPS/hp4250dtn.paper.3.name": "Letter",
    "print.tmp.printerfeatures.CUPS/hp4250dtn.plex.count": 1,
    "print.tmp.printerfeatures.hp4250dtn.supports_resolution_change": false,
    "print.print_unwriteable_margin_bottom": 56,
    "print.print_paper_name": "iso_a4",
    "print.print_headerleft": "",
    "print.tmp.printerfeatures.CUPS/hp4250dtn.paper.0.is_inch": false,
    "print.tmp.printerfeatures.CUPS/hp4250dtn.paper.1.height_mm": 297,
    "print.tmp.printerfeatures.hp4250dtn.can_change_printincolor": true,
    "print.tmp.printerfeatures.hp4250dtn.paper.5.name": "Tabloid",
    "print.tmp.printerfeatures.CUPS/hp4250dtn.colorspace.count": 1,
    "print.tmp.printerfeatures.CUPS/hp4250dtn.can_change_colorspace": false,
    "print.tmp.printerfeatures.CUPS/hp4250dtn.supports_printincolor_change": true,
    "print.tmp.printerfeatures.CUPS/hp4250dtn.can_change_paper_size": true,
    "print.tmp.printerfeatures.hp4250dtn.supports_plex_change": false,
    "print.tmp.printerfeatures.hp4250dtn.paper.3.name": "Letter",
    "print.print_oddpages": true,
    "print.tmp.printerfeatures.hp4250dtn.has_special_printerfeatures": true,
    "print.tmp.printerfeatures.CUPS/hp4250dtn.supports_jobtitle_change": false,
    "print.tmp.printerfeatures.hp4250dtn.paper.0.is_inch": false,
    "print.tmp.printerfeatures.hp4250dtn.can_change_colorspace": false,
    "print.tmp.printerfeatures.CUPS/hp4250dtn.paper.2.width_mm": 297,
    "print.tmp.printerfeatures.CUPS/hp4250dtn.supports_downloadfonts_change": false,
    "print.tmp.printerfeatures.hp4250dtn.paper.4.name": "Legal",
    "print.print_footercenter": "&PT",
    "print.print_bgimages": true,
    "print.tmp.printerfeatures.hp4250dtn.can_change_num_copies": true,
    "print.print_downloadfonts": false,
    "print.tmp.printerfeatures.hp4250dtn.paper.6.height_mm": 254,
    "print.tmp.printerfeatures.hp4250dtn.paper.5.width_mm": 279,
    "print.tmp.printerfeatures.hp4250dtn.can_change_orientation": true,
    "print.tmp.printerfeatures.hp4250dtn.paper.6.is_inch": true,
    "print.print_duplex": 0,
    "print.tmp.printerfeatures.CUPS/hp4250dtn.paper.count": 7,
    "print.tmp.printerfeatures.CUPS/hp4250dtn.can_change_num_copies": true,
    "print.tmp.printerfeatures.CUPS/hp4250dtn.orientation.0.name": "portrait",
    "print.tmp.printerfeatures.CUPS/hp4250dtn.can_change_jobtitle": false,
    "print.tmp.printerfeatures.hp4250dtn.paper.4.height_mm": 355,
    "print.tmp.printerfeatures.hp4250dtn.plex.count": 1,
    "print.tmp.printerfeatures.hp4250dtn.colorspace.0.name": "default",
    "print.tmp.printerfeatures.CUPS/hp4250dtn.paper.3.height_mm": 279,
    "print.tmp.printerfeatures.hp4250dtn.paper.1.width_mm": 210,
    "print.print_evenpages": true,
    "print.tmp.printerfeatures.CUPS/hp4250dtn.can_change_spoolercommand": false,
    "print.tmp.printerfeatures.CUPS/hp4250dtn.can_change_resolution": false,
    "print.tmp.printerfeatures.CUPS/hp4250dtn.colorspace.0.name": "default",
    "print.tmp.printerfeatures.hp4250dtn.paper.2.height_mm": 420,
    "print.tmp.printerfeatures.hp4250dtn.paper.3.is_inch": true,
    "print.tmp.printerfeatures.hp4250dtn.can_change_plex": false,
    "print.tmp.printerfeatures.hp4250dtn.can_change_downloadfonts": false,
    "print.tmp.printerfeatures.hp4250dtn.paper.0.name": "A5",
    "print.print_margin_left": "0.5",
    "print.tmp.printerfeatures.CUPS/hp4250dtn.paper.6.is_inch": true,
    "print.tmp.printerfeatures.CUPS/hp4250dtn.orientation.1.name": "landscape",
    "print.tmp.printerfeatures.hp4250dtn.paper.6.width_mm": 190,
    "print.tmp.printerfeatures.hp4250dtn.orientation.0.name": "portrait",
    "print.tmp.printerfeatures.CUPS/hp4250dtn.has_special_printerfeatures": true,
    "print.print_colorspace": "default",
    "print.tmp.printerfeatures.CUPS/hp4250dtn.paper.1.name": "A4",
    "print.print_shrink_to_fit": true,
    "print.tmp.printerfeatures.hp4250dtn.orientation.count": 2,
    "print.tmp.printerfeatures.hp4250dtn.supports_downloadfonts_change": false,
    "print.tmp.printerfeatures.CUPS/hp4250dtn.paper.0.width_mm": 148,
    "print.tmp.printerfeatures.hp4250dtn.paper.2.width_mm": 297,
    "print.print_margin_right": "0.5",
    "print.print_unwriteable_margin_top": 25,
    "print.tmp.printerfeatures.hp4250dtn.paper.1.height_mm": 297,
    "print.tmp.printerfeatures.CUPS/hp4250dtn.paper.6.name": "Executive",
    "print.print_bgcolor": true,
    "print.tmp.printerfeatures.CUPS/hp4250dtn.paper.4.is_inch": true,
    "print.print_margin_bottom": "0.5",
    "print.print_in_color": true,
    "print.tmp.printerfeatures.CUPS/hp4250dtn.supports_resolution_change": false,
    "print.print_paper_size_type": 1,
    "print.print_page_delay": 50,
    "print.tmp.printerfeatures.CUPS/hp4250dtn.paper.5.name": "Tabloid",
    "print.tmp.printerfeatures.CUPS/hp4250dtn.paper.1.width_mm": 210,
    "print.tmp.printerfeatures.hp4250dtn.paper.1.name": "A4",
    "print.tmp.printerfeatures.hp4250dtn.paper.3.width_mm": 215,
    "print.tmp.printerfeatures.hp4250dtn.resolution.count": 1,
    "print.tmp.printerfeatures.CUPS/hp4250dtn.paper.1.is_inch": false,
    "print.tmp.printerfeatures.CUPS/hp4250dtn.paper.3.width_mm": 215,
    "print.tmp.printerfeatures.CUPS/hp4250dtn.can_change_printincolor": true,
    "print.tmp.printerfeatures.CUPS/hp4250dtn.supports_spoolercommand_change": false,
    "privacy.cpd.offlineApps": true,
    "privacy.sanitize.timeSpan": 3,
    "privacy.sanitize.migrateClearSavedPwdsOnExit": true,
    "privacy.sanitize.sanitizeOnShutdown": true,
    "privacy.sanitize.migrateFx3Prefs": true,
    "security.warn_viewing_mixed": false,
    "security.disable_button.openDeviceManager": false,
    "security.disable_button.openCertManager": false,
    "services.sync.declinedEngines": "",
    "storage.vacuum.last.index": 1,
    "storage.vacuum.last.places.sqlite": 1490906331
  },
  "lockedPreferences": {},
  "javaScript": {
    "incrementalGCEnabled": true
  },
  "accessibility": {
    "isActive": false,
    "forceDisabled": 0
  },
  "libraryVersions": {
    "NSPR": {
      "minVersion": "4.13.1",
      "version": "4.13.1"
    },
    "NSS": {
      "minVersion": "3.29.3",
      "version": "3.29.3"
    },
    "NSSUTIL": {
      "minVersion": "3.29.3",
      "version": "3.29.3"
    },
    "NSSSSL": {
      "minVersion": "3.29.3",
      "version": "3.29.3"
    },
    "NSSSMIME": {
      "minVersion": "3.29.3",
      "version": "3.29.3"
    }
  },
  "userJS": {
    "exists": false
  },
  "crashes": {
    "submitted": [
      {
        "id": "bp-70fdffee-f50d-4b96-b089-fe17f2170411",
        "date": 1491937339000,
        "pending": false
      },
      {
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        "pending": false
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        "pending": false
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      {
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        "date": 1491937256000,
        "pending": false
      }
    ],
    "pending": 0
  },
  "sandbox": {
    "hasSeccompBPF": true,
    "hasSeccompTSync": true,
    "hasPrivilegedUserNamespaces": true,
    "hasUserNamespaces": true,
    "canSandboxMedia": true
  },
  "extensions": [
    {
      "name": "Adblock Plus",
      "version": "2.8.2",
      "isActive": true,
      "id": "{d10d0bf8-f5b5-c8b4-a8b2-2b9879e08c5d}"
    },
    {
      "name": "Multi-process staged rollout",
      "version": "1.9",
      "isActive": true,
      "id": "e10srollout"
    },
    {
      "name": "NoScript",
      "version": "5.0.2",
      "isActive": true,
      "id": "{73a6fe31-595d-460b-a920-fcc0f8843232}"
    },
    {
      "name": "Pocket",
      "version": "1.0.5",
      "isActive": true,
      "id": "firefox"
    },
    {
      "name": "Site Deployment Checker",
      "version": "1.0",
      "isActive": true,
      "id": "deployment-checker"
    },
    {
      "name": "Web Compat",
      "version": "1.0",
      "isActive": true,
      "id": "webcompat"
    }
  ],
  "experiments": [],
  "graphics": {
    "numTotalWindows": 1,
    "numAcceleratedWindows": 0,
    "windowLayerManagerType": "Basic",
    "windowLayerManagerRemote": true,
    "supportsHardwareH264": "No",
    "currentAudioBackend": "pulse",
    "numAcceleratedWindowsMessage": [
      ""
    ],
    "adapterDescription": "Intel Open Source Technology Center -- Mesa DRI Intel(R) HD Graphics 530 (Skylake GT2) ",
    "adapterVendorID": "Intel Open Source Technology Center",
    "adapterDeviceID": "Mesa DRI Intel(R) HD Graphics 530 (Skylake GT2) ",
    "adapterRAM": "",
    "adapterDrivers": "",
    "driverVersion": "3.0 Mesa 13.0.4",
    "driverDate": "",
    "webglRenderer": "Intel Open Source Technology Center -- Mesa DRI Intel(R) HD Graphics 530 (Skylake GT2) ",
    "webgl2Renderer": "Intel Open Source Technology Center -- Mesa DRI Intel(R) HD Graphics 530 (Skylake GT2) ",
    "info": {
      "AzureCanvasBackend": "skia",
      "AzureCanvasAccelerated": 0,
      "AzureFallbackCanvasBackend": "none",
      "AzureContentBackend": "skia",
      "CairoUseXRender": 0
    },
    "featureLog": {
      "features": [
        {
          "name": "HW_COMPOSITING",
          "description": "Compositing",
          "status": "blocked",
          "log": [
            {
              "type": "default",
              "status": "blocked",
              "message": "Acceleration blocked by platform"
            }
          ]
        },
        {
          "name": "OPENGL_COMPOSITING",
          "description": "OpenGL Compositing",
          "status": "unavailable",
          "log": [
            {
              "type": "default",
              "status": "unavailable",
              "message": "Hardware compositing is disabled"
            }
          ]
        }
      ],
      "fallbacks": []
    },
    "crashGuards": []
  }
}

Comment 8 Martin Stransky 2017-04-13 09:16:29 UTC
The e10s is still a fresh technology. New Firefox 53 comes out next week, please give e10s a try and disable if that still crashes.

You can also try latest nightly (trunk) Firefox package which is Firefox 55, via our Flatpak repo. How-to is here: https://firefox-flatpak.mojefedora.cz/ and e10s  should work fine there.

Comment 9 Peter Gückel 2017-04-14 16:49:18 UTC
I can confirm the problem in Fedora 26. It just happened on:

https://www.youtube.com/watch?v=tWcpB15Ta2w

I will hold off changing settings (I am adept at doing so, but not so adept at setting them back lol) until I have experimented with the post-Easter Firefox 53 release.

Comment 10 Peter Gückel 2017-04-14 16:50:20 UTC
I forgot to indicate the version:

firefox-52.0.2-2.fc26.x86_64

Comment 11 Peter Gückel 2017-12-31 05:49:21 UTC
resolved in f27.