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...

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 33.1 Update History User Agent Mozilla/5.0 (Windows NT 6.1; WOW64; rv:33.0) Gecko/20100101 Firefox/33.0 Profile Folder Enabled Plugins about:plugins Build Configuration about:buildconfig Memory Use about:memory Multiprocess Windows 0/1 Crash Reports for the Last 3 Days Report ID Submitted

All Crash Reports Extensions Name Version Enabled ID Yahoo! Toolbar 3.2.6.20140805113039 true {635abd67-4fe9-1b23-4f01-e679fa7484c1} McAfee Security Scan Plus 1.0 false {e4f94d1e-2f53-401e-8885-681602c0ddd8} Norton Toolbar 2014.7.9.8 false {2D3F3651-74B9-4795-BDEC-6DA2F431CB62} SimplePass Online Accounts Extension 1.0 false {41ecbc0b-34d5-4cd4-935f-253a30e2cb7e} Graphics Adapter Description Intel(R) HD Graphics Adapter Drivers igdumd64 igd10umd64 igdumdx32 igd10umd32 Adapter RAM Unknown Device ID 0x0046 Direct2D Enabled Blocked for your graphics driver version. DirectWrite Enabled false (6.2.9200.16571) Driver Date 8-25-2010 Driver Version 8.15.10.2202 GPU #2 Active false GPU Accelerated Windows 1/1 Direct3D 11 (OMTC) Vendor ID 0x8086 WebGL Renderer Google Inc. -- ANGLE (Intel(R) HD Graphics Direct3D9Ex vs_3_0 ps_3_0) windowLayerManagerRemote true AzureCanvasBackend skia AzureContentBackend cairo AzureFallbackCanvasBackend cairo AzureSkiaAccelerated 0 Important Modified Preferences Name Value accessibility.typeaheadfind.flashBar 0 browser.cache.disk.capacity 358400 browser.cache.disk.smart_size.first_run false browser.cache.disk.smart_size.use_old_max false browser.cache.frecency_experiment 2 browser.places.smartBookmarksVersion 7 browser.sessionstore.upgradeBackup.latestBuildID 20141106120505 browser.startup.homepage https://www.yahoo.com/?fr=fptb-yff32 browser.startup.homepage_override.buildID 20141106120505 browser.startup.homepage_override.mstone 33.1 dom.mozApps.used true extensions.lastAppVersion 33.1 font.internaluseonly.changed false media.gmp-gmpopenh264.lastUpdate 1415450753 media.gmp-gmpopenh264.version 1.1 media.gmp-manager.lastCheck 1416512731 network.cookie.prefsMigrated true places.database.lastMaintenance 1416512294 places.history.expiration.transient_current_max_pages 104858 plugin.disable_full_page_plugin_for_types application/pdf plugin.importedState true print.printer_HP_Photosmart_Plus_B210_series_(Network).print_bgcolor false print.printer_HP_Photosmart_Plus_B210_series_(Network).print_bgimages false print.printer_HP_Photosmart_Plus_B210_series_(Network).print_colorspace print.printer_HP_Photosmart_Plus_B210_series_(Network).print_command print.printer_HP_Photosmart_Plus_B210_series_(Network).print_downloadfonts false print.printer_HP_Photosmart_Plus_B210_series_(Network).print_duplex 1515870810 print.printer_HP_Photosmart_Plus_B210_series_(Network).print_edge_bottom 0 print.printer_HP_Photosmart_Plus_B210_series_(Network).print_edge_left 0 print.printer_HP_Photosmart_Plus_B210_series_(Network).print_edge_right 0 print.printer_HP_Photosmart_Plus_B210_series_(Network).print_edge_top 0 print.printer_HP_Photosmart_Plus_B210_series_(Network).print_evenpages true print.printer_HP_Photosmart_Plus_B210_series_(Network).print_in_color true print.printer_HP_Photosmart_Plus_B210_series_(Network).print_margin_bottom 0.5 print.printer_HP_Photosmart_Plus_B210_series_(Network).print_margin_left 0.5 print.printer_HP_Photosmart_Plus_B210_series_(Network).print_margin_right 0.5 print.printer_HP_Photosmart_Plus_B210_series_(Network).print_margin_top 0.5 print.printer_HP_Photosmart_Plus_B210_series_(Network).print_oddpages true print.printer_HP_Photosmart_Plus_B210_series_(Network).print_orientation 0 print.printer_HP_Photosmart_Plus_B210_series_(Network).print_page_delay 50 print.printer_HP_Photosmart_Plus_B210_series_(Network).print_paper_data 1 print.printer_HP_Photosmart_Plus_B210_series_(Network).print_paper_height 11.00 print.printer_HP_Photosmart_Plus_B210_series_(Network).print_paper_name print.printer_HP_Photosmart_Plus_B210_series_(Network).print_paper_size_type 0 print.printer_HP_Photosmart_Plus_B210_series_(Network).print_paper_size_unit 0 print.printer_HP_Photosmart_Plus_B210_series_(Network).print_paper_width 8.50 print.printer_HP_Photosmart_Plus_B210_series_(Network).print_plex_name print.printer_HP_Photosmart_Plus_B210_series_(Network).print_resolution 1515870810 print.printer_HP_Photosmart_Plus_B210_series_(Network).print_resolution_name print.printer_HP_Photosmart_Plus_B210_series_(Network).print_reversed false print.printer_HP_Photosmart_Plus_B210_series_(Network).print_scaling 1.00 print.printer_HP_Photosmart_Plus_B210_series_(Network).print_shrink_to_fit true print.printer_HP_Photosmart_Plus_B210_series_(Network).print_to_file false print.printer_HP_Photosmart_Plus_B210_series_(Network).print_unwriteable_margin_bottom 0 print.printer_HP_Photosmart_Plus_B210_series_(Network).print_unwriteable_margin_left 0 print.printer_HP_Photosmart_Plus_B210_series_(Network).print_unwriteable_margin_right 0 print.printer_HP_Photosmart_Plus_B210_series_(Network).print_unwriteable_margin_top 0 print.printer_HP_Photosmart_Plus_B210_series.print_bgcolor false print.printer_HP_Photosmart_Plus_B210_series.print_bgimages false print.printer_HP_Photosmart_Plus_B210_series.print_colorspace print.printer_HP_Photosmart_Plus_B210_series.print_command print.printer_HP_Photosmart_Plus_B210_series.print_downloadfonts false print.printer_HP_Photosmart_Plus_B210_series.print_duplex 1515870810 print.printer_HP_Photosmart_Plus_B210_series.print_edge_bottom 0 print.printer_HP_Photosmart_Plus_B210_series.print_edge_left 0 print.printer_HP_Photosmart_Plus_B210_series.print_edge_right 0 print.printer_HP_Photosmart_Plus_B210_series.print_edge_top 0 print.printer_HP_Photosmart_Plus_B210_series.print_evenpages true print.printer_HP_Photosmart_Plus_B210_series.print_in_color true print.printer_HP_Photosmart_Plus_B210_series.print_margin_bottom 0.5 print.printer_HP_Photosmart_Plus_B210_series.print_margin_left 0.5 print.printer_HP_Photosmart_Plus_B210_series.print_margin_right 0.5 print.printer_HP_Photosmart_Plus_B210_series.print_margin_top 0.5 print.printer_HP_Photosmart_Plus_B210_series.print_oddpages true print.printer_HP_Photosmart_Plus_B210_series.print_orientation 0 print.printer_HP_Photosmart_Plus_B210_series.print_page_delay 50 print.printer_HP_Photosmart_Plus_B210_series.print_paper_data 1 print.printer_HP_Photosmart_Plus_B210_series.print_paper_height 11.00 print.printer_HP_Photosmart_Plus_B210_series.print_paper_name print.printer_HP_Photosmart_Plus_B210_series.print_paper_size_type 0 print.printer_HP_Photosmart_Plus_B210_series.print_paper_size_unit 0 print.printer_HP_Photosmart_Plus_B210_series.print_paper_width 8.50 print.printer_HP_Photosmart_Plus_B210_series.print_plex_name print.printer_HP_Photosmart_Plus_B210_series.print_resolution 1515870810 print.printer_HP_Photosmart_Plus_B210_series.print_resolution_name print.printer_HP_Photosmart_Plus_B210_series.print_reversed false print.printer_HP_Photosmart_Plus_B210_series.print_scaling 1.00 print.printer_HP_Photosmart_Plus_B210_series.print_shrink_to_fit true print.printer_HP_Photosmart_Plus_B210_series.print_to_file false print.printer_HP_Photosmart_Plus_B210_series.print_unwriteable_margin_bottom 0 print.printer_HP_Photosmart_Plus_B210_series.print_unwriteable_margin_left 0 print.printer_HP_Photosmart_Plus_B210_series.print_unwriteable_margin_right 0 print.printer_HP_Photosmart_Plus_B210_series.print_unwriteable_margin_top 0 privacy.sanitize.migrateFx3Prefs true storage.vacuum.last.index 1 storage.vacuum.last.places.sqlite 1415108587 Important Locked Preferences Name Value JavaScript Incremental GC true Accessibility Activated false Prevent Accessibility 0 Library Versions Expected minimum version Version in use NSPR 4.10.7 4.10.7 NSS 3.17.2 Basic ECC 3.17.2 Basic ECC NSSSMIME 3.17.2 Basic ECC 3.17.2 Basic ECC NSSSSL 3.17.2 Basic ECC 3.17.2 Basic ECC NSSUTIL 3.17.2 3.17.2 Experimental Features Name ID Description Active End Date Homepage

does it help when you update your graphics driver? https://downloadcenter.intel.com/Detail_Desc.aspx?DwnldID=22521

If I am not having any problems watching the videos on Google Chrome, why would the graphics driver only impact FF. Before I do as you suggest, I need to understand why your suggestion is required to help FF, but apparently not needed for Google

Thanks

Upgrade your graphics drivers to use hardware acceleration and WebGL

UPGRADED THE GRAPHICS AS YOU REQUESTED AND IT APPEARS THE JITTERY VIDEO HAS BEEN RESOLVED, SO PROBLEM HAS BEEN SOLVED

THANKS RANDY