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...

Application Basics

Name: Firefox Version: 49.0.1 Build ID: 20160922113459 Update Channel: release User Agent: Mozilla/5.0 (Windows NT 6.1; rv:49.0) Gecko/20100101 Firefox/49.0 OS: Windows_NT 6.1 Multiprocess Windows: 1/1 (Enabled by default) Safe Mode: false

Crash Reports for the Last 3 Days

All Crash Reports

Extensions

Name: Multi-process staged rollout Version: 1.3 Enabled: true ID: [email protected]

Name: Pocket Version: 1.0.4 Enabled: true ID: [email protected]

Name: Web Compat Version: 1.0 Enabled: true ID: [email protected]

Name: PasswordBox Version: 1.36.0.3741 Enabled: false ID: [email protected]

Name: Trend Micro BEP Firefox Extension Version: 9.1.0.1089 Enabled: false ID: [email protected]

Name: Trend Micro Osprey Firefox Extension Version: 2.0.0.1083 Enabled: false ID: {BBB77B49-9FF4-4d5c-8FE2-92B1D6CD696C}

Name: Trend Micro Toolbar Version: 9.0.0.1256 Enabled: false ID: {22181a4d-af90-4ca3-a569-faed9118d6bc}

Graphics

Features Compositing: Direct3D 9 Asynchronous Pan/Zoom: wheel input enabled WebGL Renderer: Google Inc. -- ANGLE (Intel(R) G41 Express Chipset Direct3D9Ex vs_3_0 ps_3_0) Hardware H264 Decoding: No; Hardware video decoding disabled or blacklisted Direct2D: Blocked for your graphics driver version. DirectWrite: false (6.2.9200.17568) GPU #1 Active: Yes Description: Intel(R) G41 Express Chipset Vendor ID: 0x8086 Device ID: 0x2e32 Driver Version: 8.15.10.2182 Driver Date: 7-19-2010 Drivers: igdumdx32 igd10umd32 Subsys ID: 04001028 RAM: Unknown

Diagnostics AzureCanvasAccelerated: 0 AzureCanvasBackend: skia AzureContentBackend: cairo AzureFallbackCanvasBackend: cairo Decision Log D3D11_COMPOSITING: Blocklisted due to known issues; bug 1116812 DIRECT2D: unavailable by default: Direct2D requires Direct3D 11 compositing D3D11_HW_ANGLE: unavailable by default: D3D11 compositing is disabled disabled by env: D3D11 compositing is disabled

Important Modified Preferences

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: 4 browser.download.importedFromSqlite: true browser.download.useDownloadDir: false browser.places.smartBookmarksVersion: 8 browser.privatebrowsing.autostart: true browser.sessionstore.upgradeBackup.latestBuildID: 20160922113459 browser.startup.homepage: https://online.rezexpert.com/ browser.startup.homepage_override.buildID: 20160922113459 browser.startup.homepage_override.mstone: 49.0.1 browser.tabs.remote.autostart.2: true browser.urlbar.daysBeforeHidingSuggestionsPrompt: 3 browser.urlbar.lastSuggestionsPromptDate: 20160926 dom.apps.lastUpdate.buildID: 20160922113459 dom.apps.lastUpdate.mstone: 49.0.1 dom.apps.reset-permissions: true extensions.lastAppVersion: 49.0.1 gfx.blacklist.direct2d: 3 gfx.blacklist.direct2d.failureid: FEATURE_FAILURE_DL_BLACKLIST_g984 gfx.crash-guard.d3d11layers.appVersion: 49.0.1 gfx.crash-guard.d3d11layers.deviceID: 0x2e32 gfx.crash-guard.d3d11layers.driverVersion: 8.15.10.2182 gfx.crash-guard.d3d11layers.feature-d2d: false gfx.crash-guard.d3d11layers.feature-d3d11: false gfx.crash-guard.status.d3d11layers: 2 media.gmp-eme-adobe.abi: x86-msvc-x86 media.gmp-eme-adobe.lastUpdate: 1474909913 media.gmp-eme-adobe.version: 17 media.gmp-gmpopenh264.abi: x86-msvc-x86 media.gmp-gmpopenh264.lastUpdate: 1474909913 media.gmp-gmpopenh264.version: 1.6 media.gmp-manager.buildID: 20160922113459 media.gmp-manager.lastCheck: 1474909911 media.gmp-widevinecdm.abi: x86-msvc-x86 media.gmp-widevinecdm.lastUpdate: 1474909914 media.gmp-widevinecdm.version: 1.4.8.903 media.gmp.storage.version.observed: 1 media.hardware-video-decoding.failed: false network.cookie.prefsMigrated: true network.predictor.cleaned-up: true places.database.lastMaintenance: 1474913371 places.history.expiration.transient_current_max_pages: 86289 plugin.disable_full_page_plugin_for_types: application/pdf plugin.importedState: true privacy.sanitize.timeSpan: 0 storage.vacuum.last.index: 0 storage.vacuum.last.places.sqlite: 1474913371

Important Locked Preferences

Places Database

JavaScript

Incremental GC: true

Accessibility

Activated: false Prevent Accessibility: 0

Library Versions

NSPR Expected minimum version: 4.12 Version in use: 4.12

NSS Expected minimum version: 3.25 Version in use: 3.25

NSSSMIME Expected minimum version: 3.25 Version in use: 3.25

NSSSSL Expected minimum version: 3.25 Version in use: 3.25

NSSUTIL Expected minimum version: 3.25 Version in use: 3.25

Experimental Features

thank you. can you please disable hardware acceleration in the firefox menu ≡ > options > advanced > general and see if that helps (the setting will take a restart of the browser to take effect).

hi again, mozilla's developer's are looking into the issue but are looking for more information. if disabling hardware acceleration helped in your case, would you be so kind to run another test for us:

• first please re-enable hardware-acceleration in the firefox menu ≡ > options > advanced > general again and restart the browser.
• download and install firefox 48.0.2 again from https://download.mozilla.org/?product=firefox-48.0.2&os=win
• in firefox 48.0.2 go to the menu ≡ > help ? > troubleshooting information, copy the contents of that page and paste them here into a reply on the forum? this will help us understand the issue...

thanks a lot! (afterwards you can update to 49 and disable hwa again for the moment)

thank you for the follow-up information you posted at https://support.mozilla.org/en-US/questions/1141189

please try the following in order to fix the problem: enter about:config into the firefox address bar (confirm the info message in case it shows up) & search for the preference named layers.allow-d3d9-fallback. double-click it and change its value to false and then restart the browser once...