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 44.0 Build ID 20160123151951 Update History Update Channel release User Agent Mozilla/5.0 (Windows NT 10.0; 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

All Crash Reports Extensions Name Version Enabled ID Download YouTube Videos as MP4 1.8.5 true {b9bfaf1c-a63f-47cd-8b9a-29526ced9060} DuckDuckGo Plus 0.4.6.1-signed true jid1-ZAdIEUB7XOzOJw@jetpack FastestFox 5.2.1.1-signed true smarterwiki@wikiatic.com Flagfox 5.1.7 true {1018e4d6-728f-4b20-ad56-37578a4de76b} Forecastfox (fix version) 2.3.7 true forecastfox@s3_fix_version Ghostery 5.4.10 true firefox@ghostery.com HTTPS-Everywhere 5.1.2 true https-everywhere-eff@eff.org Lightbeam 1.3.0.1-signed true jid1-F9UJ2thwoAm5gQ@jetpack NoScript 2.9.0.1rc2 true {73a6fe31-595d-460b-a920-fcc0f8843232} Password Exporter 1.3.1.1-signed true {B17C1C5A-04B1-11DB-9804-B622A1EF5492} Personas Plus 1.7.3.1-signed.1-let-fixed true personas@christopher.beard Privacy Badger 1.0.5 true jid1-MnnxcxisBPnSXQ-eff@jetpack Saved Password Editor 2.9.5 true savedpasswordeditor@daniel.dawson uBlock 0.9.5.0.1-let-fixed true {2b10c1c8-a11f-4bad-fe9c-1c11e82cac42} Adblock Plus 2.7.1 false {d10d0bf8-f5b5-c8b4-a8b2-2b9879e08c5d} Firebug 2.0.13 false firebug@software.joehewitt.com Logitech Device Detection 1.23.0.5 false DeviceDetection@logitech.com Nightly Tester Tools 3.7.1-signed false {8620c15f-30dc-4dba-a131-7c5d20cf4a29} Norton Identity Safe 2016.5.6.90 false {C1A2A613-35F1-4FCF-B27F-2840527B6556} Sage 1.5.4 false {a6ca9b3b-5e52-4f47-85d8-cca35bb57596} Graphics Adapter Description NVIDIA GeForce GT 120 Adapter Drivers nvd3dumx,nvwgf2umx,nvwgf2umx nvd3dum,nvwgf2um,nvwgf2um Adapter RAM 1024 Asynchronous Pan/Zoom none Device ID 0x0646 Direct2D Enabled true DirectWrite Enabled true (10.0.10586.0) Driver Date 10-13-2015 Driver Version 9.18.13.4192 GPU #2 Active false GPU Accelerated Windows 2/2 Direct3D 11 (OMTC) Subsys ID 00000000 Supports Hardware H264 Decoding Yes Vendor ID 0x10de WebGL Renderer Google Inc. -- ANGLE (NVIDIA GeForce GT 120 Direct3D11 vs_4_0 ps_4_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_cached_value 358400 browser.cache.disk.smart_size.first_run false browser.cache.disk.smart_size.use_old_max false browser.cache.frecency_experiment 3 browser.download.importedFromSqlite true browser.download.manager.alertOnEXEOpen true browser.download.manager.closeWhenDone true browser.download.useDownloadDir false browser.history_expire_days_min 3000 browser.history_expire_days.mirror 180 browser.link.open_newwindow 2 browser.places.importBookmarksHTML false browser.places.importDefaults false browser.places.leftPaneFolderId -1 browser.places.migratePostDataAnnotations false browser.places.smartBookmarksVersion 7 browser.places.updateRecentTagsUri false browser.search.param.yahoo-fr chr-greentree_ff&ilc=12&type=937811 browser.search.useDBForOrder true browser.sessionstore.max_tabs_undo 20 browser.sessionstore.max_windows_undo 10 browser.sessionstore.upgradeBackup.latestBuildID 20160123151951 browser.startup.homepage http://www.cnn.com/?refresh=1|http://www.thedenverchannel.com/home|https://mail.google.com/mail/u/0/?ui=2#inbox|https:// browser.startup.homepage_override.buildID 20160123151951 browser.startup.homepage_override.mstone 44.0 browser.tabs.loadInBackground false browser.tabs.warnOnClose false dom.apps.reset-permissions true dom.disable_open_during_load false dom.max_chrome_script_run_time 0 dom.max_script_run_time 20 dom.mozApps.used true dom.w3c_touch_events.expose false extensions.checkCompatibility false extensions.checkCompatibility.3.6 true extensions.checkCompatibility.3.6b true extensions.checkCompatibility.3.6p true extensions.checkCompatibility.3.6pre true extensions.checkCompatibility.3.7a true extensions.checkCompatibility.4.0b true extensions.checkCompatibility.4.0p true extensions.checkCompatibility.4.0pre true extensions.checkCompatibility.4.2 true extensions.checkCompatibility.4.2a true extensions.checkCompatibility.4.2a1 true extensions.checkCompatibility.4.2a1pre true extensions.checkCompatibility.4.2b true extensions.checkCompatibility.5.0 true extensions.checkCompatibility.5.0a true extensions.checkCompatibility.5.0b true extensions.checkCompatibility.6.0 true extensions.checkCompatibility.6.0a true extensions.checkCompatibility.6.0b true extensions.checkCompatibility.7.0 true extensions.checkCompatibility.7.0a true extensions.checkCompatibility.7.0b true extensions.checkCompatibility.8.0 false extensions.checkCompatibility.9.0 false extensions.checkCompatibility.nightly false extensions.lastAppVersion 44.0 font.internaluseonly.changed false font.size.fixed.x-western 16 general.useragent.extra.microsoftdotnet ( .NET CLR 3.5.30729; .NET4.0C) gfx.crash-guard.d3d11layers.appVersion 44.0 gfx.crash-guard.d3d11layers.deviceID 0x0646 gfx.crash-guard.d3d11layers.driverVersion 9.18.13.4192 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.checkDX10 false gfx.direct3d.last_used_feature_level_idx 1 gfx.driver-init.appVersion 42.0 gfx.driver-init.deviceID 0x0646 gfx.driver-init.driverVersion 9.18.13.4192 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 1453848991 media.gmp-eme-adobe.version 15 media.gmp-gmpopenh264.abi x86-msvc-x64 media.gmp-gmpopenh264.lastUpdate 1453848991 media.gmp-gmpopenh264.version 1.5.3 media.gmp-manager.buildID 20160123151951 media.gmp-manager.lastCheck 1453848988 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 1453927558 places.history.expiration.transient_current_max_pages 104858 places.history.expiration.transient_optimal_database_size 167772160 places.last_vacuum 1295555776 plugin.disable_full_page_plugin_for_types application/pdf plugin.importedState true plugin.state.npwpf 0

Start Firefox in Safe Mode {web Link} by holding down the <Shift>
(Mac=Options) key, and then starting Firefox. Is the problem still there?

Look on your desktop. Do you see a folder called; Old Firefox?

https://support.mozilla.org/en-US/kb/recovering-important-data-from-an-old-profile

https://support.mozilla.org/en-US/kb/back-and-restore-information-firefox-profiles

Please note that the Saved Password Editor 2.9.5 was installed just today as an attempt to find my old data

My desktop does not have a folder "Old Firefox"

In my profile the key3.db is present, but will not import

is logins.json present (and not empty) as well, as those two files work in tandem?

logins.json is present, but was 1 kb then and now that I have been rebuilding my logins from scratch it is 5 kb

i am sorry for this issue - as it looks at the moment this happens for a small number of users with an unforeseen configuration, probably triggered by a preference set by the Norton Identity Safe addon, which is present in your case as well. firefox developers are working on a mitigation for that problem as we speak, but unfortunately that can not help after the fact, when passwords are already lost...

I did suspect that a Norton conflict might happen, but thought Norton was disabled. My extension list has bulked up the browser so that problems are more likely, anyway. Thankfully I have a printout of the saved passwords and can recover reasonably well with less work. Thank you all for looking into this.

These can't get your data back, but will help in the future.

These add-ons can be a great help by backing up and restoring Firefox

FEBE (Firefox Environment Backup Extension) {web link} FEBE allows you to quickly and easily backup your Firefox extensions, history, passwords, and more. In fact, it goes beyond just backing up -- It will actually rebuild your saved files individually into installable .xpi files. It will also make backups of files that you choose.

OPIE {web link} Import/Export extension preferences

I'm not sure is you can have file history have made a previous copy available.

• http://nicbedford.co.uk/software/systemrestoreexplorer/

Passwords can possibly get lost under these conditions:

privacy.clearOnShutdown.passwords = True
privacy.sanitize.sanitizeOnShutdown = false

Note that privacy.clearOnShutdown.passwords is no longer supported in current releases (Bug 1102184) because of issues with Sync, so you normally wouldn't have this pref as user set.

• bug 1242176 - All passwords deleted upon startup if privacy.clearOnShutdown.passwords = True but privacy.sanitize.sanitizeOnShutdown = false

Please do not comment in bug reports
https://bugzilla.mozilla.org/page.cgi?id=etiquette.html

I have an external drive for automatic backup, but I don't see my app data for the roaming user. Apparently I noticed this last September and did not upgrade the backup utility (from the free version) at that time. It seemed to me that I would have been worried enough to save important data some other way and so I checked several 32 gig thumb drives and found the Firefox profile backup made 09/15/2015. My ultrabook with Windows 10 and Firefox 44 (configured similarly to my desktop) also had lost its logins. I copied the logins.json and key3.db files to the ultrabook profile which restored things to that earlier date. Also on the thumb drive were the xml and txt files from my export of the passwords done at that time and which I had the printout for. Thank you all for the help. This issue demonstrates the importance of vigilance to constant backups. I have another 2 gig external drive but I have not checked that one to see what it DOESN'T backup. My bad.

In the event that the passwords information is lost, you should record all information in a separate text file somewhere else on your hard drive, or written down. You can easily copy and paste if you need to do so. If you are concerned about someone else looking at that file, you can compress it using a password.