hi, firefox supports TLS1.2 so i'm not sure why you get this message.

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...

Hi Philipp. Thanks for the fast answer. A further complication, I'm afraid :-(

When I click on the menu ≡ I don't get help.

I have: cut, copy, paste, - (minus sign), 100%. +, New Private Window, Save page, print, history, full screen, find, home, options, add-ons, hello, developer, synced tabs, pocket and on the bottom a line with my emails address and customize... Debbby

the help section is hidden under the (?) button at the bottom right of the menu...

Thank you Philipp.

Clicked on Copy raw data to clipboard. Is this what you needed?

{

 "application": {
   "name": "Firefox",
   "version": "46.0.1",
   "buildID": "20160502172042",
   "userAgent": "Mozilla/5.0 (Windows NT 6.1; WOW64; rv:46.0) Gecko/20100101 Firefox/46.0",
   "safeMode": false,
   "updateChannel": "release",
   "supportURL": "https://support.mozilla.org/1/firefox/46.0.1/WINNT/en-US/",
   "numTotalWindows": 3,
   "numRemoteWindows": 0,
   "remoteAutoStart": false,
   "autoStartStatus": 2
 },
 "modifiedPreferences": {
   "accessibility.typeaheadfind.flashBar": 0,
   "browser.cache.disk.smart_size.first_run": false,
   "browser.cache.disk.hashstats_reported": 1,
   "browser.cache.disk.filesystem_reported": 1,
   "browser.cache.disk.capacity": 358400,
   "browser.cache.frecency_experiment": 1,
   "browser.cache.disk.smart_size.use_old_max": false,
   "browser.download.folderList": 2,
   "browser.download.importedFromSqlite": true,
   "browser.download.manager.alertOnEXEOpen": true,
   "browser.link.open_newwindow": 2,
   "browser.places.smartBookmarksVersion": 7,
   "browser.search.useDBForOrder": true,
   "browser.sessionstore.upgradeBackup.latestBuildID": "20160502172042",
   "browser.sessionstore.restore_on_demand": false,
   "browser.startup.homepage_override.mstone": "46.0.1",
   "browser.startup.homepage_override.buildID": "20160502172042",
   "browser.urlbar.userMadeSearchSuggestionsChoice": true,
   "dom.apps.reset-permissions": true,
   "dom.mozApps.used": true,
   "extensions.lastAppVersion": "46.0.1",
   "gfx.crash-guard.glcontext.gfx.driver-init.webgl-angle-force-d3d11": false,
   "gfx.crash-guard.d3d11layers.appVersion": "46.0.1",
   "gfx.driver-init.appVersion": "42.0",
   "gfx.crash-guard.glcontext.gfx.driver-init.direct3d11-angle": true,
   "gfx.crash-guard.d3d11layers.driverVersion": "9.18.10.3186",
   "gfx.crash-guard.d3d11layers.deviceID": "0x0402",
   "gfx.driver-init.deviceID": "0x0402",
   "gfx.driver-init.driverVersion": "9.18.10.3186",
   "gfx.driver-init.status": 2,
   "gfx.crash-guard.glcontext.gfx.driver-init.webgl-angle-try-d3d11": true,
   "gfx.crash-guard.glcontext.gfx.driver-init.webgl-angle": true,
   "gfx.crash-guard.d3d11layers.feature-d3d11": true,
   "gfx.crash-guard.status.glcontext": 2,
   "gfx.crash-guard.d3d11layers.feature-d2d": true,
   "gfx.crash-guard.status.d3d11layers": 2,
   "gfx.driver-init.feature-d3d11": true,
   "gfx.crash-guard.glcontext.gfx.driver-init.webgl-angle-force-warp": false,
   "gfx.driver-init.feature-d2d": true,
   "gfx.direct3d.last_used_feature_level_idx": 0,
   "gfx.crash-guard.status.d3d9video": 2,
   "media.gmp-eme-adobe.lastUpdate": 1461739128,
   "media.gmp-gmpopenh264.lastUpdate": 1454006841,
   "media.gmp-eme-adobe.abi": "x86-msvc-x64",
   "media.hardware-video-decoding.failed": false,
   "media.gmp-gmpopenh264.version": "1.5.3",
   "media.gmp-manager.lastCheck": 1464537342,
   "media.youtube-ua.override.to": "43",
   "media.gmp-eme-adobe.version": "17",
   "media.gmp-gmpopenh264.abi": "x86-msvc-x64",
   "media.gmp-manager.buildID": "20160502172042",
   "network.predictor.cleaned-up": true,
   "network.cookie.prefsMigrated": true,
   "places.history.expiration.transient_current_max_pages": 98812,
   "places.database.lastMaintenance": 1464414372,
   "plugin.importedState": true,
   "plugin.disable_full_page_plugin_for_types": "application/pdf",
   "privacy.sanitize.timeSpan": 0,
   "privacy.sanitize.migrateClearSavedPwdsOnExit": true,
   "privacy.cpd.sessions": false,
   "privacy.donottrackheader.enabled": true,
   "privacy.sanitize.migrateFx3Prefs": true,
   "services.sync.declinedEngines": "",
   "services.sync.lastPing": 1464590984,
   "services.sync.lastSync": "Mon May 30 2016 15:16:02 GMT+0300 (Jerusalem Standard Time)",
   "services.sync.numClients": 1,
   "services.sync.engine.prefs.modified": false,
   "storage.vacuum.last.places.sqlite": 1464414372,
   "storage.vacuum.last.index": 1
 },
 "lockedPreferences": {},
 "graphics": {
   "numTotalWindows": 3,
   "numAcceleratedWindows": 3,
   "windowLayerManagerType": "Direct3D 11",
   "windowLayerManagerRemote": true,
   "supportsHardwareH264": "Yes",
   "adapterDescription": "Intel(R) HD Graphics",
   "adapterVendorID": "0x8086",
   "adapterDeviceID": "0x0402",
   "adapterSubsysID": "04021849",
   "adapterRAM": "Unknown",
   "adapterDrivers": "igdumdim64 igd10iumd64 igd10iumd64 igdumdim32 igd10iumd32 igd10iumd32",
   "driverVersion": "9.18.10.3186",
   "driverDate": "5-17-2013",
   "adapterDescription2": "",
   "adapterVendorID2": "",
   "adapterDeviceID2": "",
   "adapterSubsysID2": "",
   "adapterRAM2": "",
   "adapterDrivers2": "",
   "driverVersion2": "",
   "driverDate2": "",
   "isGPU2Active": false,
   "direct2DEnabled": true,
   "directWriteEnabled": true,
   "directWriteVersion": "6.2.9200.17568",
   "webglRenderer": "Google Inc. -- ANGLE (Intel(R) HD Graphics Direct3D11 vs_5_0 ps_5_0)",
   "info": {
     "AzureCanvasBackend": "direct2d 1.1",
     "AzureSkiaAccelerated": 0,
     "AzureFallbackCanvasBackend": "cairo",
     "AzureContentBackend": "direct2d 1.1"
   }
 },
 "javaScript": {
   "incrementalGCEnabled": true
 },
 "accessibility": {
   "isActive": false,
   "forceDisabled": 0
 },
 "libraryVersions": {
   "NSPR": {
     "minVersion": "4.12",
     "version": "4.12"
   },
   "NSS": {
     "minVersion": "3.22.3 Basic ECC",
     "version": "3.22.3 Basic ECC"
   },
   "NSSUTIL": {
     "minVersion": "3.22.3",
     "version": "3.22.3"
   },
   "NSSSSL": {
     "minVersion": "3.22.3 Basic ECC",
     "version": "3.22.3 Basic ECC"
   },
   "NSSSMIME": {
     "minVersion": "3.22.3 Basic ECC",
     "version": "3.22.3 Basic ECC"
   }
 },
 "userJS": {
   "exists": false
 },
 "crashes": {
   "submitted": [],
   "pending": 0
 },
 "extensions": [
   {
     "name": "Adblock Plus",
     "version": "2.7.3",
     "isActive": true,
     "id": "{d10d0bf8-f5b5-c8b4-a8b2-2b9879e08c5d}"
   },
   {
     "name": "Avast Online Security",
     "version": "10.3.3.44",
     "isActive": true,
     "id": "wrc@avast.com"
   },
   {
     "name": "Avast SafePrice",
     "version": "10.3.5.39",
     "isActive": true,
     "id": "sp@avast.com"
   },
   {
     "name": "Firefox Hello Beta",
     "version": "1.3.2",
     "isActive": true,
     "id": "loop@mozilla.org"
   },
   {
     "name": "Flash and Video Download",
     "version": "1.83",
     "isActive": true,
     "id": "{bee6eb20-01e0-ebd1-da83-080329fb9a3a}"
   },
   {
     "name": "Multi-process staged rollout",
     "version": "1.0",
     "isActive": true,
     "id": "e10srollout@mozilla.org"
   },
   {
     "name": "NoScript",
     "version": "2.9.0.11",
     "isActive": true,
     "id": "{73a6fe31-595d-460b-a920-fcc0f8843232}"
   },
   {
     "name": "Pocket",
     "version": "1.0",
     "isActive": true,
     "id": "firefox@getpocket.com"
   },
   {
     "name": "Avira SafeSearch Plus",
     "version": "1.2.0",
     "isActive": false,
     "id": "safesearchplus@avira.com"
   },
   {
     "name": "Webmail Ad Blocker",
     "version": "4.29",
     "isActive": false,
     "id": "gmailnoads@mywebber.com"
   }
 ],
 "experiments": []

}

does it make any difference when you disable the scanning of https connections in avast like it's described in?: How to troubleshoot security error codes on secure websites it may well be that they fiddle with your connection and actually downgrade your security... all the other security settings seem correct.

Hi Philipp,

Did as you suggested and un-clicked the "Enable HTTPS Scanning" then went to 2nd Life and made a purchase

Got the same notice re the TLS 1.2  :-( Debby

you could visit a site like https://www.ssllabs.com/ssltest/viewMyClient.html which should tell you all the security features a browser supports - under "protocol features" it should show "TLS 1.2 Yes", if it does then it's a fluke in 2nd life's detection algorithm and you might contact them about it...

OK Thanks. I'll try that.

Who is the issuer of the certificate in case you have security software that is intercepting the scecure connection and is sending its own certificate instead?

See also:

• https://support.mozilla.org/kb/troubleshoot-SEC_ERROR_UNKNOWN_ISSUER

You can retrieve the certificate and check details like the issuer of the certificate and the certificate chain.

• click "Advanced" to expand the error message
• click "Add Exception" to open "Add Security Exception"

If this isn't possible then open "Add Security Exception" by pasting this URL in the location/address bar and paste the URL of the website (https://xxx.xxx) in it's location field.

• chrome://pippki/content/exceptionDialog.xul

Let Firefox retrieve the certificate -> "Get Certificate"

• click the "View" button and inspect the certificate

You can see details like the issuer of the certificate and used intermediate certificates in the Details tab.

Who is the issuer of the certificate?

You can open the about:config page via the location/address bar and search for prefs contain tls. You can reset user set (bold) tls pref(s) on the about:config page via the right-click context menu to the default value.

You can open the about:config page via the location/address bar. You can accept the warning and click "I'll be careful" to continue.

• http://kb.mozillazine.org/about:config

Ha Ha on me... After going through all of the difficult and complicated procedures recommended, it turns out that the TLS 1.2 problem is due to an upgrade of Second Life itself and nothing to do with the browser!!

Thank you Phillip and Cor-el for your help!