This Connection is Untrusted and few websites layout is broken

Question

I have tried almost all the solution to get rid of the issues but could not find a solution.
My Chrome and IE is working fine as its expected in same machine but not firefox.
Issues - 1
Website layout is disorted eg.
https://support.mozilla.org/en-US/products/firefox?as=u&utm_source=inproduct
https://www.facebook.com/
Issues - 2
This Connection is Untrusted
You have asked Firefox to connect securely to www.facebook.com, but we can't confirm that your connection is secure.
Normally, when you try to connect securely, sites will present trusted identification to prove that you are going to the right place. However, this site's identity can't be verified.
I have tried following Solution:
1. Uninstalling firefox completly including deleting profile + reboot + install
2. Reset the Firefox
3. Clear the caches and evreything.
But could not solve my problem so now I am posting this questions. I am using Latest Firefox with Windows 7.
Please help me to get rid of these issues as I am highly dependent on Firefox.
-Rajesh
troubleshoot info
Application Basics
Name: Firefox
Version: 33.1.1
User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:33.0) Gecko/20100101 Firefox/33.0
Multiprocess Windows: 0/1
Crash Reports for the Last 3 Days
All Crash Reports
Extensions
Name: Troubleshooter
Version: 1.1a
Enabled: true
ID: [email protected]
Name: WebEx Productivity Tools
Version: 2.0
Enabled: false
ID: [email protected]
Graphics
Adapter Description: Intel(R) HD Graphics 4600
Adapter Drivers: igdumdim64 igd10iumd64 igd10iumd64 igdumdim32 igd10iumd32 igd10iumd32
Adapter RAM: Unknown
Device ID: 0x0416
DirectWrite Enabled: false (6.1.7601.18245)
Driver Date: 6-3-2013
Driver Version: 9.18.10.3204
GPU #2 Active: false
GPU Accelerated Windows: 0/1 Basic (OMTC)
Vendor ID: 0x8086
WebGL Renderer: Google Inc. -- ANGLE (Intel(R) HD Graphics 4600 Direct3D9Ex vs_3_0 ps_3_0)
windowLayerManagerRemote: true
AzureCanvasBackend: skia
AzureContentBackend: cairo
AzureFallbackCanvasBackend: cairo
AzureSkiaAccelerated: 0
Important Modified Preferences
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: 4
browser.places.smartBookmarksVersion: 7
browser.sessionstore.upgradeBackup.latestBuildID: 20141113143407
browser.startup.homepage_override.buildID: 20141113143407
browser.startup.homepage_override.mstone: 33.1.1
dom.mozApps.used: true
extensions.lastAppVersion: 33.1.1
gfx.direct2d.disabled: true
layers.acceleration.disabled: true
network.cookie.prefsMigrated: true
places.history.expiration.transient_current_max_pages: 104858
plugin.disable_full_page_plugin_for_types: application/pdf
plugin.importedState: true
privacy.sanitize.migrateFx3Prefs: true
Important Locked Preferences
JavaScript
Incremental GC: true
Accessibility
Activated: false
Prevent Accessibility: 0
Library Versions
NSPR
Expected minimum version: 4.10.7
Version in use: 4.10.7
NSS
Expected minimum version: 3.17.2 Basic ECC
Version in use: 3.17.2 Basic ECC
NSSSMIME
Expected minimum version: 3.17.2 Basic ECC
Version in use: 3.17.2 Basic ECC
NSSSSL
Expected minimum version: 3.17.2 Basic ECC
Version in use: 3.17.2 Basic ECC
NSSUTIL
Expected minimum version: 3.17.2
Version in use: 3.17.2
Experimental Features
---------------------

Answer 1

hello, first please make sure that the date, time & timezone are set correctly on your system. if this doesn't solve the issue (or it is already set properly), a possible solution depends on different factors:
* what is the '''error code''' shown under ''technical details'' on the error page?
in case the error code equals ''sec_error_unknown_issuer'', please attempt to add an exception on the bottom of the error page & inspect the certificate (see the screenshot attached for instructions):
* which '''issuer information''' does the certificate contain?
thank you!
[["This Connection is Untrusted" error message appears - What to do]]