What is your computer system and Firefox?

Some problems occurs when your Internet security program was set to trust the previous version of Firefox, but no longer recognizes your updated version as trusted. Now how to fix the problem: To allow Firefox to connect to the Internet again;

• Make sure your Internet security software is up-to-date (i.e. you are running the latest version).
• Remove Firefox from your program's list of trusted or recognized programs. For detailed instructions, see

Configure firewalls so that Firefox can access the Internet. {web link}

Thanks for the reply. However, I just checked and my Windows firewall is already set to allow Firefox. So that's not the problem. Interestingly, when registering for this forum I received an email from Mozilla Support to confirm my email - and in this instance I WAS able to click on the link in the email and Firefox opened and worked perfectly. Otherwise, I cannot get Firefox to connect to anything at all.

hi, can you please see if uninstalling firefox 44 first and then installing the 64bit version from https://www.mozilla.org/en-US/firefox/all/ does solve this issue for you?

Thanks Philipp, but I'm already running 64bit version.

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? thanks

Application Basics Name Firefox Version 44.0 Build ID 20160123151951 Update History Update Channel release User Agent Mozilla/5.0 (Windows NT 6.1; WOW64; rv:44.0) Gecko/20100101 Firefox/44.0 Profile Folder Enabled Plugins about:plugins Build Configuration about:buildconfig Memory Use about:memory Registered Service Workers about:serviceworkers Multiprocess Windows 0/2 (default: false) Safe Mode false Crash Reports for the Last 3 Days Report ID Submitted bp-fecc7db2-6514-46e7-9c87-7960b2160129 10 hours ago bp-50248a3f-dc9a-4f43-b20e-7bc2c2160129 11 hours ago

All Crash Reports (including 3 pending crashes in the given time range) Extensions Name Version Enabled ID Graphics Adapter Description NVIDIA GeForce GT 740 Adapter Drivers nvd3dumx,nvwgf2umx,nvwgf2umx nvd3dum,nvwgf2um,nvwgf2um Adapter RAM 4095 Asynchronous Pan/Zoom none Device ID 0x0fc8 Direct2D Enabled true DirectWrite Enabled true (6.2.9200.17568) Driver Date 11-2-2015 Driver Version 10.18.13.5887 GPU #2 Active false GPU Accelerated Windows 2/2 Direct3D 11 (OMTC) Subsys ID 36561458 Supports Hardware H264 Decoding Yes Vendor ID 0x10de WebGL Renderer Google Inc. -- ANGLE (NVIDIA GeForce GT 740 Direct3D11 vs_5_0 ps_5_0) windowLayerManagerRemote true AzureCanvasBackend direct2d 1.1 AzureContentBackend direct2d 1.1 AzureFallbackCanvasBackend cairo AzureSkiaAccelerated 0 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.frecency_experiment 2 browser.download.importedFromSqlite true browser.places.smartBookmarksVersion 7 browser.sessionstore.upgradeBackup.latestBuildID 20160123151951 browser.startup.homepage www.google.com.au browser.startup.homepage_override.buildID 20160123151951 browser.startup.homepage_override.mstone 44.0 dom.apps.reset-permissions true dom.mozApps.used true extensions.lastAppVersion 44.0 font.internaluseonly.changed false gfx.crash-guard.d3d11layers.appVersion 44.0 gfx.crash-guard.d3d11layers.deviceID 0x0fc8 gfx.crash-guard.d3d11layers.driverVersion 10.18.13.5887 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 gfx.driver-init.appVersion 42.0 gfx.driver-init.deviceID 0x0fc8 gfx.driver-init.driverVersion 10.18.13.5887 gfx.driver-init.feature-d2d true gfx.driver-init.feature-d3d11 true gfx.driver-init.status 2 media.gmp-eme-adobe.abi x86-msvc-x64 media.gmp-eme-adobe.lastUpdate 1453878610 media.gmp-eme-adobe.version 15 media.gmp-gmpopenh264.abi x86-msvc-x64 media.gmp-gmpopenh264.lastUpdate 1453878611 media.gmp-gmpopenh264.version 1.5.3 media.gmp-manager.buildID 20160123151951 media.gmp-manager.lastCheck 1454067064 media.hardware-video-decoding.failed false media.youtube-ua.override.to 43 network.auth.allow-subresource-auth 2 network.cookie.prefsMigrated true network.predictor.cleaned-up true places.database.lastMaintenance 1453887863 places.history.expiration.transient_current_max_pages 104858 plugin.disable_full_page_plugin_for_types application/pdf plugin.importedState true print.printer_HP_ENVY_4500_series.print_bgcolor false print.printer_HP_ENVY_4500_series.print_bgimages false print.printer_HP_ENVY_4500_series.print_colorspace print.printer_HP_ENVY_4500_series.print_command print.printer_HP_ENVY_4500_series.print_downloadfonts false print.printer_HP_ENVY_4500_series.print_duplex 1515870810 print.printer_HP_ENVY_4500_series.print_edge_bottom 0 print.printer_HP_ENVY_4500_series.print_edge_left 0 print.printer_HP_ENVY_4500_series.print_edge_right 0 print.printer_HP_ENVY_4500_series.print_edge_top 0 print.printer_HP_ENVY_4500_series.print_evenpages true print.printer_HP_ENVY_4500_series.print_footercenter print.printer_HP_ENVY_4500_series.print_footerleft &PT print.printer_HP_ENVY_4500_series.print_footerright &D print.printer_HP_ENVY_4500_series.print_headercenter 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print.printer_HP_ENVY_4500_series.print_resolution_name print.printer_HP_ENVY_4500_series.print_reversed false print.printer_HP_ENVY_4500_series.print_scaling 1.00 print.printer_HP_ENVY_4500_series.print_shrink_to_fit true print.printer_HP_ENVY_4500_series.print_to_file false print.printer_HP_ENVY_4500_series.print_unwriteable_margin_bottom 0 print.printer_HP_ENVY_4500_series.print_unwriteable_margin_left 0 print.printer_HP_ENVY_4500_series.print_unwriteable_margin_right 0 print.printer_HP_ENVY_4500_series.print_unwriteable_margin_top 0 privacy.cpd.downloads false privacy.cpd.formdata false privacy.cpd.history false privacy.cpd.sessions false privacy.sanitize.migrateClearSavedPwdsOnExit true privacy.sanitize.migrateFx3Prefs true privacy.sanitize.timeSpan 0 storage.vacuum.last.index 1 storage.vacuum.last.places.sqlite 1451889314 Important Locked Preferences Name Value JavaScript Incremental GC true Accessibility Activated false Prevent Accessibility 0 Library Versions Expected minimum version Version in use NSPR 4.11 4.11 NSS 3.21 Basic ECC 3.21 Basic ECC NSSSMIME 3.21 Basic ECC 3.21 Basic ECC NSSSSL 3.21 Basic ECC 3.21 Basic ECC NSSUTIL 3.21 3.21 Experimental Features Name ID Description

thanks! this shows that you are not using the firefox 64bit version though, so please proceed as recommended before: uninstall firefox first and then download and install the 64bit version from https://www.mozilla.org/en-US/firefox/all/

Before I do that... doesn't the "WOW64" in User Agent line mean I'm running the 64 bit?

no, that actually stands for "Windows 32-bit on Windows 64-bit" :-) https://en.wikipedia.org/wiki/WoW64

Well, that seems to have fixed it! I dare not ask why all of a sudden one day out of the blue I need to install the 64bit - I probably wouldn't understand the answer! Thank you very much Philipp for spending the time to help me out. Cheers, Karen