Is this with one website, several, many?

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?

The problem is with many websites. As I am scrolling down the page, the text morphs into big lines that drag down the page. Sometimes I can wait and it will eventually load properly. Often I wait and it never properly loads.

cbotbyl said

the text morphs into big lines that drag down the page

Ahh, you should have said that before.

We are currently aware of this bug. Please see bug 1304360 for more information about the situation.

This issue can currently be solved by disabling hardware acceleration on Firefox.

The developers need your help to solve this issue. If possible, can you please enter about:support in the Firefox address bar. This page contains information about your system and Firefox. Please click the Copy Text To Clipboard button, and paste the information into this thread. This will help the developers to discover the cause of the issue and create a potential patch.

Thanks in advance for your assistance with this bug. Sorry for any inconvenience.

Application Basics

Name: Firefox Version: 49.0.1 Build ID: 20160922113459 Update Channel: release User Agent: Mozilla/5.0 (Windows NT 6.0; WOW64; rv:49.0) Gecko/20100101 Firefox/49.0 OS: Windows_NT 6.0 Multiprocess Windows: 1/1 (Enabled by default) Safe Mode: false

Crash Reports for the Last 3 Days

All Crash Reports (including 1 pending crash in the given time range)

Extensions

Name: Asynchronous Plugin Rendering Version: 1.0 Enabled: true ID: asyncrendering@mozilla.org

Name: D3D9 Acceleration Fallback Version: 1.0 Enabled: true ID: d3d9fallback@mozilla.org

Name: Multi-process staged rollout Version: 1.3 Enabled: true ID: e10srollout@mozilla.org

Name: Pocket Version: 1.0.4 Enabled: true ID: firefox@getpocket.com

Name: Web Compat Version: 1.0 Enabled: true ID: webcompat@mozilla.org

Name: Microsoft .NET Framework Assistant Version: 0.0.0 Enabled: false ID: {20a82645-c095-46ed-80e3-08825760534b}

Graphics

Features Compositing: Basic Asynchronous Pan/Zoom: wheel input enabled WebGL Renderer: Google Inc. -- ANGLE (Mobile Intel(R) 4 Series Express Chipset Family 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 (7.0.6002.23845) GPU #1 Active: Yes Description: Mobile Intel(R) 4 Series Express Chipset Family Vendor ID: 0x8086 Device ID: 0x2a42 Driver Version: 7.15.10.1670 Driver Date: 3-3-2009 Drivers: igdumd64 igd10umd64 Subsys ID: 00000000 RAM: Unknown

Diagnostics AzureCanvasAccelerated: 0 AzureCanvasBackend: skia AzureContentBackend: cairo AzureFallbackCanvasBackend: cairo failures: [GFX1]: D3D11 device creation failed: 0x887a0004 Decision Log D3D11_COMPOSITING: failed by runtime: Failed to acquire a D3D11 device D3D9_COMPOSITING: disabled by user: Disabled via layers.allow-d3d9-fallback DIRECT2D: Blocklisted; failure code BLOCKLIST_FEATURE_FAILURE_DL_BLACKLIST_g984 D3D11_HW_ANGLE: disabled by env: D3D11 compositing is disabled

Failure Log (#0) Assert: D3D11 device creation failed: 0x887a0004

Important Modified Preferences

browser.cache.disk.capacity: 358400 browser.cache.disk.filesystem_reported: 1 browser.cache.disk.hashstats_reported: 1 browser.cache.disk.smart_size.first_run: false browser.cache.frecency_experiment: 4 browser.download.importedFromSqlite: true browser.places.smartBookmarksVersion: 8 browser.sessionstore.upgradeBackup.latestBuildID: 20160922113459 browser.startup.homepage_override.buildID: 20160922113459 browser.startup.homepage_override.mstone: 49.0.1 browser.tabs.remote.autostart.2: true browser.urlbar.daysBeforeHidingSuggestionsPrompt: 0 browser.urlbar.lastSuggestionsPromptDate: 20161001 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: 0x2a42 gfx.crash-guard.d3d11layers.driverVersion: 7.15.10.1670 gfx.crash-guard.d3d11layers.feature-d2d: false gfx.crash-guard.d3d11layers.feature-d3d11: true gfx.crash-guard.status.d3d11layers: 2 layers.allow-d3d9-fallback: false media.gmp-eme-adobe.abi: x86-msvc-x64 media.gmp-eme-adobe.lastUpdate: 1475022420 media.gmp-eme-adobe.version: 17 media.gmp-gmpopenh264.abi: x86-msvc-x64 media.gmp-gmpopenh264.lastUpdate: 1475022421 media.gmp-gmpopenh264.version: 1.6 media.gmp-manager.buildID: 20160922113459 media.gmp-manager.lastCheck: 1476901837 media.gmp-widevinecdm.abi: x86-msvc-x64 media.gmp-widevinecdm.lastUpdate: 1475022425 media.gmp-widevinecdm.version: 1.4.8.903 media.gmp.storage.version.observed: 1 media.hardware-video-decoding.failed: false media.webrtc.debug.log_file: C:\Users\Owner\AppData\Local\Temp\WebRTC.log network.cookie.prefsMigrated: true network.predictor.cleaned-up: true places.database.lastMaintenance: 1476909491 places.history.expiration.transient_current_max_pages: 104858 plugin.disable_full_page_plugin_for_types: application/pdf plugin.importedState: true print.printer_Brother_MFC-J885DW_Printer.print_bgcolor: false print.printer_Brother_MFC-J885DW_Printer.print_bgimages: false print.printer_Brother_MFC-J885DW_Printer.print_duplex: -437918235 print.printer_Brother_MFC-J885DW_Printer.print_edge_bottom: 0 print.printer_Brother_MFC-J885DW_Printer.print_edge_left: 0 print.printer_Brother_MFC-J885DW_Printer.print_edge_right: 0 print.printer_Brother_MFC-J885DW_Printer.print_edge_top: 0 print.printer_Brother_MFC-J885DW_Printer.print_evenpages: true print.printer_Brother_MFC-J885DW_Printer.print_footercenter: print.printer_Brother_MFC-J885DW_Printer.print_footerleft: &PT print.printer_Brother_MFC-J885DW_Printer.print_footerright: &D print.printer_Brother_MFC-J885DW_Printer.print_headercenter: print.printer_Brother_MFC-J885DW_Printer.print_headerleft: &T print.printer_Brother_MFC-J885DW_Printer.print_headerright: &U print.printer_Brother_MFC-J885DW_Printer.print_in_color: true print.printer_Brother_MFC-J885DW_Printer.print_margin_bottom: 0.5 print.printer_Brother_MFC-J885DW_Printer.print_margin_left: 0.5 print.printer_Brother_MFC-J885DW_Printer.print_margin_right: 0.5 print.printer_Brother_MFC-J885DW_Printer.print_margin_top: 0.5 print.printer_Brother_MFC-J885DW_Printer.print_oddpages: true print.printer_Brother_MFC-J885DW_Printer.print_orientation: 0 print.printer_Brother_MFC-J885DW_Printer.print_page_delay: 50 print.printer_Brother_MFC-J885DW_Printer.print_paper_data: 1 print.printer_Brother_MFC-J885DW_Printer.print_paper_height: 11.00 print.printer_Brother_MFC-J885DW_Printer.print_paper_name: print.printer_Brother_MFC-J885DW_Printer.print_paper_size_unit: 0 print.printer_Brother_MFC-J885DW_Printer.print_paper_width: 8.50 print.printer_Brother_MFC-J885DW_Printer.print_resolution: 600 print.printer_Brother_MFC-J885DW_Printer.print_reversed: false print.printer_Brother_MFC-J885DW_Printer.print_scaling: 1.00 print.printer_Brother_MFC-J885DW_Printer.print_shrink_to_fit: true print.printer_Brother_MFC-J885DW_Printer.print_to_file: false print.printer_Brother_MFC-J885DW_Printer.print_unwriteable_margin_bottom: 0 print.printer_Brother_MFC-J885DW_Printer.print_unwriteable_margin_left: 0 print.printer_Brother_MFC-J885DW_Printer.print_unwriteable_margin_right: 0 print.printer_Brother_MFC-J885DW_Printer.print_unwriteable_margin_top: 0 privacy.cpd.sessions: false privacy.sanitize.timeSpan: 0 storage.vacuum.last.index: 1 storage.vacuum.last.places.sqlite: 1475024141

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

Some of your crash reports weren’t sent to the Mozilla Servers.

In the address bar, type about:crashes<enter>. Note: If any reports do not have BP in front of the numbers/letters, click it to submit them.

The crash report is several pages of data. We need the report numbers to see the whole report.

Using your mouse, mark the most resent 7 - 10 crash reports, and copy them. Now go to the reply box below and paste them in.

(Please don't take a screenshot of your crashes, just copy and paste the IDs. The below image is just an example of what your Firefox screen should look like.)

First, let me thank you for continuing to advise me on this problem. Second, I did disable hardware acceleration and so far this evening I have not had any further problem. I did type 'about:crashes' into the address bar, none of the reports had BP in front of them. When I clicked on the link the page that opened indicated "Crash Not Found" (or something like that) for every one. Now they all have a 'BP' in front of them. Did you still need me to copy crash reports and paste them to you?

If you are no longer having problems, that is good. Don't worry about those reports.