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...

astUpdate 1447906228 media.gmp-gmpopenh264.version 1.5.1 media.gmp-manager.buildID 20160623154057 media.gmp-manager.lastCheck 1467628327 media.gmp.storage.version.observed 1 media.hardware-video-decoding.failed false network.auth.allow-subresource-auth 2 network.cookie.prefsMigrated true network.predictor.cleaned-up true places.database.lastMaintenance 1467606069 places.history.expiration.transient_current_max_pages 91967 plugin.disable_full_page_plugin_for_types application/pdf plugin.importedState true plugin.state.flash 0 plugin.state.java 0 plugin.state.npauthz 0 plugin.state.npdeployjava 0 plugin.state.nppdf 0 plugin.state.npvlc 0 print.printer_HP_Deskjet_3520_series.print_bgcolor false print.printer_HP_Deskjet_3520_series.print_bgimages false print.printer_HP_Deskjet_3520_series.print_duplex -437918235 print.printer_HP_Deskjet_3520_series.print_edge_bottom 0 print.printer_HP_Deskjet_3520_series.print_edge_left 0 print.printer_HP_Deskjet_3520_series.print_edge_right 0 print.printer_HP_Deskjet_3520_series.print_edge_top 0 print.printer_HP_Deskjet_3520_series.print_evenpages true print.printer_HP_Deskjet_3520_series.print_footercenter print.printer_HP_Deskjet_3520_series.print_footerleft &PT print.printer_HP_Deskjet_3520_series.print_footerright &D print.printer_HP_Deskjet_3520_series.print_headercenter print.printer_HP_Deskjet_3520_series.print_headerleft &T print.printer_HP_Deskjet_3520_series.print_headerright &U print.printer_HP_Deskjet_3520_series.print_in_color true print.printer_HP_Deskjet_3520_series.print_margin_bottom 0.5 print.printer_HP_Deskjet_3520_series.print_margin_left 0.5 print.printer_HP_Deskjet_3520_series.print_margin_right 0.5 print.printer_HP_Deskjet_3520_series.print_margin_top 0.5 print.printer_HP_Deskjet_3520_series.print_oddpages true print.printer_HP_Deskjet_3520_series.print_orientation 0 print.printer_HP_Deskjet_3520_series.print_page_delay 50 print.printer_HP_Deskjet_3520_series.print_paper_data 1 print.printer_HP_Deskjet_3520_series.print_paper_height 11.00 print.printer_HP_Deskjet_3520_series.print_paper_name print.printer_HP_Deskjet_3520_series.print_paper_size_type 0 print.printer_HP_Deskjet_3520_series.print_paper_size_unit 0 print.printer_HP_Deskjet_3520_series.print_paper_width 8.50 print.printer_HP_Deskjet_3520_series.print_resolution -437918235 print.printer_HP_Deskjet_3520_series.print_reversed false print.printer_HP_Deskjet_3520_series.print_scaling 1.00 print.printer_HP_Deskjet_3520_series.print_shrink_to_fit true print.printer_HP_Deskjet_3520_series.print_to_file false print.printer_HP_Deskjet_3520_series.print_unwriteable_margin_bottom 0 print.printer_HP_Deskjet_3520_series.print_unwriteable_margin_left 0 print.printer_HP_Deskjet_3520_series.print_unwriteable_margin_right 0 print.printer_HP_Deskjet_3520_series.print_unwriteable_margin_top 0 print.printer_hp_deskjet_5100.print_bgcolor false print.printer_hp_deskjet_5100.print_bgimages false print.printer_hp_deskjet_5100.print_duplex -437918235 print.printer_hp_deskjet_5100.print_edge_bottom 0 print.printer_hp_deskjet_5100.print_edge_left 0 print.printer_hp_deskjet_5100.print_edge_right 0 print.printer_hp_deskjet_5100.print_edge_top 0 print.printer_hp_deskjet_5100.print_evenpages true print.printer_hp_deskjet_5100.print_in_color true print.printer_hp_deskjet_5100.print_margin_bottom 0.5 print.printer_hp_deskjet_5100.print_margin_left 0.5 print.printer_hp_deskjet_5100.print_margin_right 0.5 print.printer_hp_deskjet_5100.print_margin_top 0.5 print.printer_hp_deskjet_5100.print_oddpages true print.printer_hp_deskjet_5100.print_orientation 0 print.printer_hp_deskjet_5100.print_page_delay 50 print.printer_hp_deskjet_5 Troubleshooting Information This page contains technical information that might be useful when you're trying to solve a problem. If you are looking for answers to common questions about Firefox, check out our support website. Application Basics Name Firefox Version 47.0.1 Build ID 20160623154057 Update History Update Channel release User Agent Mozilla/5.0 (Windows NT 6.1; rv:47.0) Gecko/20100101 Firefox/47.0 OS Windows_NT 6.1 x86 Profile Folder Enabled Plugins about:plugins Build Configuration about:buildconfig Memory Use about:memory Registered Service Workers about:serviceworkers Multiprocess Windows 0/3 (Disabled) Safe Mode false Profiles about:profiles Crash Reports for the Last 3 Days Report ID Submitted

All Crash Reports Extensions Name Version Enabled ID Firefox Hello 1.3.2 true [email protected] Multi-process staged rollout 1.0 true [email protected] Norton Identity Safe 2016.6.0.66 true {C1A2A613-35F1-4FCF-B27F-2840527B6556} Pocket 1.0.2 true [email protected] RAMBack 1.0.1-signed.1-signed true [email protected] Graphics Adapter Description Intel(R) HD Graphics 4600 Adapter Drivers igdumdim32 igd10iumd32 igd10iumd32 Adapter RAM Unknown Asynchronous Pan/Zoom none Device ID 0x0412 DirectWrite Enabled false (6.1.7600.16385) Driver Date 4-4-2016 Driver Version 10.18.10.4425 GPU #2 Active false GPU Accelerated Windows 0/2 Basic (OMTC) Subsys ID 18ea103c Supports Hardware H264 Decoding No; Hardware video decoding disabled or blacklisted Vendor ID 0x8086 windowLayerManagerRemote true AzureCanvasAccelerated 0 AzureCanvasBackend skia AzureContentBackend cairo AzureFallbackCanvasBackend cairo Important Modified Preferences Name Value accessibility.typeaheadfind.flashBar 0 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.disk.smart_size.use_old_max false browser.cache.frecency_experiment 4 browser.download.importedFromSqlite true browser.places.smartBookmarksVersion 7 browser.search.update false browser.search.useDBForOrder true browser.sessionstore.upgradeBackup.latestBuildID 20160623154057 browser.startup.homepage google.com browser.startup.homepage_override.buildID 20160623154057 browser.startup.homepage_override.mstone 47.0.1 browser.tabs.warnOnClose false dom.apps.reset-permissions true dom.mozApps.used true extensions.lastAppVersion 47.0.1 gfx.crash-guard.d3d11layers.appVersion 43.0.3 gfx.crash-guard.d3d11layers.deviceID 0x0412 gfx.crash-guard.d3d11layers.driverVersion 10.18.10.3266 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.direct2d.disabled true gfx.direct3d.last_used_feature_level_idx 0 gfx.driver-init.appVersion 41.0.2 gfx.driver-init.deviceID 0x0412 gfx.driver-init.driverVersion 10.18.10.3266 gfx.driver-init.feature-d2d true gfx.driver-init.feature-d3d11 true gfx.driver-init.status 2 keyword.URL http://www.bing.com/search?FORM=SK2BDF&PC=SK2B&q= layers.acceleration.disabled true media.eme.enabled false media.gmp-eme-adobe.enabled false media.gmp-gmpopenh264.enabled false media.gmp-gmpopenh264.l 100.print_paper_data 1 print.printer_hp_deskjet_5100.print_paper_height 11.00 print.printer_hp_deskjet_5100.print_paper_name print.printer_hp_deskjet_5100.print_paper_size_type 0 print.printer_hp_deskjet_5100.print_paper_size_unit 0 print.printer_hp_deskjet_5100.print_paper_width 8.50 print.printer_hp_deskjet_5100.print_resolution -437918235 print.printer_hp_deskjet_5100.print_reversed false print.printer_hp_deskjet_5100.print_scaling 1.00 print.printer_hp_deskjet_5100.print_shrink_to_fit true print.printer_hp_deskjet_5100.print_to_file false print.printer_hp_deskjet_5100.print_unwriteable_margin_bottom 0 print.printer_hp_deskjet_5100.print_unwriteable_margin_left 0 print.printer_hp_deskjet_5100.print_unwriteable_margin_right 0 print.printer_hp_deskjet_5100.print_unwriteable_margin_top 0 privacy.sanitize.migrateFx3Prefs true privacy.sanitize.timeSpan 0 security.OCSP.enabled 0 security.ssl.errorReporting.automatic true services.sync.declinedEngines storage.vacuum.last.index 1 storage.vacuum.last.places.sqlite 1465186963 webgl.disabled true Important Locked Preferences Name Value JavaScript Incremental GC true Accessibility Activated false Prevent Accessibility 0 Library Versions Expected minimum version Version in use NSPR 4.12 4.12 NSS 3.23 Basic ECC 3.23 Basic ECC NSSSMIME 3.23 Basic ECC 3.23 Basic ECC NSSSSL 3.23 Basic ECC 3.23 Basic ECC NSSUTIL 3.23 3.23 Experimental Features Name ID Description Active End Date Homepage Branch

thanks, have you disabled hardware acceleration in the firefox menu ≡ > options > advanced > general panel on purpose? and could you also enter about:crashes into the address bar and copy/paste the last few crash reports starting with bp- here into a reply in the forum?

Yes, i have already disabled hardware acceleration in firefox. find attached snapshot of about crashes in mozilla