Hello dekin232,

dekin232 said

Turn on TLS 1.0, TLS 1.1, and TLS 1.2 in Advanced settings

do you mean that you have in about:config the security.tls.version.min preference to 1 (default), and the security.tls.version.max preference to 3 (default) ?

thank you

yes, I do.

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...

ok, I am now getting a message which looks like this: "Secure Connection Failed

The connection to mail.google.com was interrupted while the page was loading.

   The page you are trying to view cannot be shown because the authenticity of the received data could not be verified."

Philipp, thank you for your help, which part of the page should I be pasting? the entire thing?

yes, use the button on top to copy the text contents of the page & paste everything into a reply. it would also be interesting what sort of security software you are using...

Application Basics

Name: Firefox Version: 48.0.2 Build ID: 20160823121617 Update Channel: release User Agent: Mozilla/5.0 (Windows NT 10.0; WOW64; rv:48.0) Gecko/20100101 Firefox/48.0 OS: Windows_NT 10.0 x86 Multiprocess Windows: 0/1 (Disabled) Safe Mode: false

Crash Reports for the Last 3 Days

All Crash Reports

Extensions

Name: Firefox Hello Version: 1.4.4 Enabled: true ID: [email protected]

Name: Multi-process staged rollout Version: 1.1 Enabled: true ID: [email protected]

Name: Pocket Version: 1.0.4 Enabled: true ID: [email protected]

Name: AllGamesHome Toolbar Version: 1.0.24 Enabled: false ID: {C178BB02-BFCF-4E69-AB7C-DED3BD0291BD}

Graphics

Features Compositing: Direct3D 11 Asynchronous Pan/Zoom: none WebGL Renderer: Google Inc. -- ANGLE (NVIDIA GeForce 315M Direct3D11 vs_4_1 ps_4_1) Hardware H264 Decoding: Yes; Using D3D11 API Direct2D: true DirectWrite: true (10.0.10586.494) GPU #1 Active: Yes Description: NVIDIA GeForce 315M Vendor ID: 0x10de Device ID: 0x0a7a Driver Version: 9.18.13.4192 Driver Date: 10-13-2015 Drivers: nvd3dumx,nvwgf2umx,nvwgf2umx nvd3dum,nvwgf2um,nvwgf2um Subsys ID: 00000000 RAM: 512

Diagnostics ClearType Parameters: Gamma: 1800 Pixel Structure: R ClearType Level: 100 Enhanced Contrast: 50 AzureCanvasAccelerated: 0 AzureCanvasBackend: direct2d 1.1 AzureContentBackend: direct2d 1.1 AzureFallbackCanvasBackend: cairo ClearType Parameters: Gamma: 1800 Pixel Structure: R ClearType Level: 100 Enhanced Contrast: 50

Important Modified Preferences

accessibility.typeaheadfind.flashBar: 0 browser.cache.disk.capacity: 358400 browser.cache.disk.filesystem_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: 1 browser.download.importedFromSqlite: true browser.places.smartBookmarksVersion: 8 browser.sessionstore.upgradeBackup.latestBuildID: 20160823121617 browser.startup.homepage: http://home.allgameshome.com/ browser.startup.homepage_override.buildID: 20160823121617 browser.startup.homepage_override.mstone: 48.0.2 browser.urlbar.daysBeforeHidingSuggestionsPrompt: 3 browser.urlbar.lastSuggestionsPromptDate: 20160905 dom.apps.reset-permissions: true dom.mozApps.used: true dom.w3c_touch_events.expose: false extensions.lastAppVersion: 48.0.2 gfx.crash-guard.d3d11layers.appVersion: 48.0.2 gfx.crash-guard.d3d11layers.deviceID: 0x0a7a 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.status.: 2 gfx.crash-guard.status.d3d11layers: 2 gfx.direct3d.prefer_10_1: true keyword.URL: http://home.allgameshome.com/results.php?category=web&s= media.gmp-manager.buildID: 20160823121617 media.gmp.storage.version.observed: 1 media.hardware-video-decoding.failed: false network.cookie.prefsMigrated: true network.predictor.cleaned-up: true places.database.lastMaintenance: 1473080781 places.history.expiration.transient_current_max_pages: 103753 plugin.disable_full_page_plugin_for_types: application/pdf plugin.importedState: true privacy.sanitize.migrateFx3Prefs: true security.warn_viewing_mixed: false storage.vacuum.last.index: 0 storage.vacuum.last.places.sqlite: 1473080191 ui.osk.debug.keyboardDisplayReason: IKPOS: Touch screen not found.

Important Locked Preferences

JavaScript

Incremental GC: true

Accessibility

Activated: false Prevent Accessibility: 0

Library Versions

NSPR Expected minimum version: 4.12 Version in use: 4.12

NSS Expected minimum version: 3.24 Basic ECC Version in use: 3.24 Basic ECC

NSSSMIME Expected minimum version: 3.24 Basic ECC Version in use: 3.24 Basic ECC

NSSSSL Expected minimum version: 3.24 Basic ECC Version in use: 3.24 Basic ECC

NSSUTIL Expected minimum version: 3.24 Version in use: 3.24

Experimental Features

As far as i know, I have Adfender filter on, but no other security software working at the moment.

ok, this sounds like a likely cause. please try to disable or fully uninstall adfender once. in addition please set up firefox in the menu ≡ > options > advanced > network > connection - settings... to directly connect to the internet ('no proxy').

furthermore i'd recommend to run a full scan of your system with different other security tools like the free trial version of malwarebytes and adwcleaner.

ok, i've uninstalled Adfender, and am running a windows defender scan now, which i remembered is installed automatically into my computer. I also changed the settings to "no proxy" as advised... but gmail is still elusive.

pleas explicitly use the 2 recommended tools as well, because they would be more focused on browser hijackers as well...

thank you so much Philipp for all your help. I couldn't believe how fast this adwcleaner worked. I really appreciate your time.