hello, could you go to the firefox menu ≡ > help ? > troubleshooting information, copy the contents of that page and paste them here into a reply on the forum? this might give us a clue what is going on...

Like this? (It's in Dutch, but I hope it's clear...)

Toepassingsbasics

Naam: Firefox Versie: 49.0.2 Build-ID: 20161019084923 Updatekanaal: release Useragent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:49.0) Gecko/20100101 Firefox/49.0 OS: Windows_NT 10.0 Multiprocess-vensters: 0/2 (Uitgeschakeld door add-ons) Veilige modus: false

Crashrapporten van de afgelopen 3 dagen

Alle crashrapporten

Extensies

Naam: Asynchronous Plugin Rendering Versie: 2.0 Ingeschakeld: true ID: [email protected]

Naam: Mozilla Partner Defaults Versie: 1.0.1 Ingeschakeld: true ID: [email protected]

Naam: Multi-process staged rollout Versie: 1.3 Ingeschakeld: true ID: [email protected]

Naam: Pocket Versie: 1.0.4 Ingeschakeld: true ID: [email protected]

Naam: Web Compat Versie: 1.0 Ingeschakeld: true ID: [email protected]

Naam: Amazon Assistant for Firefox Versie: 10.161.13.1002 Ingeschakeld: false ID: [email protected]

Naam: AVG Web TuneUp Versie: 4.3.6.255 Ingeschakeld: false ID: avg@toolbar

Grafisch

Functies Samenstellen: Direct3D 11 Asynchroon pannen/zoomen: geen WebGL-renderer: Google Inc. -- ANGLE (Intel(R) HD Graphics 520 Direct3D11 vs_5_0 ps_5_0) Hardwarematige H264-decodering: Yes; D3D11 blacklisted with DLL igd10iumd32.dll (20.19.15.4390); Using D3D9 API Direct2D: true DirectWrite: true (10.0.14393.351) GPU #1 Actief: Ja Beschrijving: Intel(R) HD Graphics 520 Leverancier-ID: 0x8086 Apparaat-ID: 0x1916 Stuurprogrammaversie: 20.19.15.4390 Datum van stuurprogramma: 2-18-2016 Stuurprogramma’s: igdumdim64 igd10iumd64 igd10iumd64 igd12umd64 igdumdim32 igd10iumd32 igd10iumd32 igd12umd32 Subsysteem-ID: 10941025 RAM: Unknown

Diagnostische gegevens AzureCanvasAccelerated: 0 AzureCanvasBackend: direct2d 1.1 AzureContentBackend: direct2d 1.1 AzureFallbackCanvasBackend: cairo Beslissingenlogboek D3D9_COMPOSITING: disabled by default: Disabled by default

Belangrijke aangepaste voorkeuren

browser.cache.disk.capacity: 358400 browser.cache.disk.filesystem_reported: 1 browser.cache.disk.smart_size.first_run: false browser.cache.disk.smart_size.use_old_max: false browser.cache.frecency_experiment: 3 browser.download.importedFromSqlite: true browser.download.manager.alertOnEXEOpen: true browser.places.smartBookmarksVersion: 8 browser.privatebrowsing.autostart: true browser.sessionstore.upgradeBackup.latestBuildID: 20160623154057 browser.startup.homepage: www.google.nl browser.startup.homepage_override.buildID: 20161019084923 browser.startup.homepage_override.mstone: 49.0.2 browser.tabs.remote.autostart.2: true dom.apps.lastUpdate.buildID: 20161019084923 dom.apps.lastUpdate.mstone: 49.0.2 dom.apps.reset-permissions: true dom.mozApps.used: true extensions.lastAppVersion: 49.0.2 font.internaluseonly.changed: true gfx.crash-guard.d3d11layers.appVersion: 49.0.2 gfx.crash-guard.d3d11layers.deviceID: 0x1916 gfx.crash-guard.d3d11layers.driverVersion: 20.19.15.4390 gfx.crash-guard.d3d11layers.feature-d2d: true gfx.crash-guard.d3d11layers.feature-d3d11: true gfx.crash-guard.glcontext.gfx.driver-init.direct3d11-angle: true gfx.crash-guard.glcontext.gfx.driver-init.webgl-angle: true gfx.crash-guard.glcontext.gfx.driver-init.webgl-angle-force-d3d11: false gfx.crash-guard.glcontext.gfx.driver-init.webgl-angle-force-warp: false gfx.crash-guard.glcontext.gfx.driver-init.webgl-angle-try-d3d11: true gfx.crash-guard.status.d3d11layers: 2 gfx.crash-guard.status.d3d9video: 2 gfx.crash-guard.status.glcontext: 2 gfx.direct3d.last_used_feature_level_idx: 0 media.benchmark.vp9.fps: 132 media.benchmark.vp9.versioncheck: 1 media.gmp-eme-adobe.abi: x86-msvc-x64 media.gmp-eme-adobe.lastUpdate: 1470704254 media.gmp-eme-adobe.version: 17 media.gmp-gmpopenh264.abi: x86-msvc-x64 media.gmp-gmpopenh264.enabled: true media.gmp-gmpopenh264.lastUpdate: 1472164821 media.gmp-gmpopenh264.version: 1.6 media.gmp-manager.buildID: 20161019084923 media.gmp-manager.lastCheck: 1478027617 media.gmp-widevinecdm.abi: x86-msvc-x64 media.gmp-widevinecdm.lastUpdate: 1474836954 media.gmp-widevinecdm.version: 1.4.8.903 media.gmp.storage.version.observed: 1 media.hardware-video-decoding.failed: false media.webrtc.debug.aec_log_dir: C:\Users\arnou\AppData\Local\Temp media.webrtc.debug.log_file: C:\Users\arnou\AppData\Local\Temp\WebRTC.log network.cookie.prefsMigrated: true network.predictor.cleaned-up: true places.database.lastMaintenance: 1477610038 places.history.expiration.transient_current_max_pages: 104858 plugin.disable_full_page_plugin_for_types: application/pdf plugin.importedState: true privacy.sanitize.migrateFx3Prefs: true services.sync.declinedEngines: storage.vacuum.last.index: 0 storage.vacuum.last.places.sqlite: 1477960330 ui.osk.debug.keyboardDisplayReason: IKPOS: Touch screen not found.

Belangrijke vergrendelde voorkeuren

Places-database

JavaScript

Incrementele GC: true

Toegankelijkheid

Geactiveerd: false Toegankelijkheid voorkomen: 0

Bibliotheekversies

NSPR Verwachte minimale versie: 4.12 Gebruikte versie: 4.12

NSS Verwachte minimale versie: 3.25 Gebruikte versie: 3.25

NSSSMIME Verwachte minimale versie: 3.25 Gebruikte versie: 3.25

NSSSSL Verwachte minimale versie: 3.25 Gebruikte versie: 3.25

NSSUTIL Verwachte minimale versie: 3.25 Gebruikte versie: 3.25

Experimentele functies

See if there are updates for your graphics drivers https://support.mozilla.org/kb/upgrade-graphics-drivers-use-hardware-acceleration

Start Firefox in Safe Mode {web Link} by holding down the <Shift>
(Mac=Options) key, and then starting Firefox. A small dialog should appear. Click Start In Safe Mode (not Refresh).

Is the problem still there?

In safe mode the problem is gone. So could it be an add on causing this?

Did you get updates for your graphics drivers?

Type about:preferences#advanced<Enter> in the address bar.

Under Advanced, Select General. Look for and turn off Use Hardware Acceleration.

Restart Firefox. Are there any problems?

thanks Bon2016, we got similar reports by other users with an intel hd 520 gpu - apparently their latest driver can fix it: https://downloadcenter.intel.com/download/26228/Intel-Graphics-Driver-for-Windows-10-and-Windows-7-8-1-15-40-?product=88355 (scroll down to download the version for windows 10 64bit).

Thanks for your replies. I've turned off hardware acceleration and the problem seems solved!

I also looked for the latest drivers from Intel, and although they have a very recent update, they refer to the computer manufacturer (Acer) for the latest drivers. Since there is no new driver available through the Acer portal, I've asked them when the new driver will be available.

Anyway, problem solved!

Hello,

I am glad to hear that your problem has been resolved. If you haven't already, please select the answer that solves the problem. This will help other users with similar problems find the solution more easily.

Thank you for contacting Mozilla Support.