Unable to open Facebook

Question

Both my Browsesr - Safari & Firefox doesn't load Facebook home page completely.
I've attached screen shots from both the browser.
As seen from many other dicussions I'v deleted all my cookies as well as tried reset option in both the browser. Still pages are displayed as per the screen shot.
It was perfectly working till yesterday and today morning all I did was to restart my laptop after updating latest Version on Firefox.
Please help.
Note: Also from morning, every website I type in from any of the browser, It displays the message stating the certificate of the website is invalid and whether I want to Continue or Cancel. I am getting this message even for legitimate websites like google, gmail, apple etc.

Answer 1

1. The process by which OS X checks the validity of root SSL certificates doesn't work behind the authenticating SOCKS proxies used on some enterprise networks. If applicable, contact your network administrator. The proxy server may need to have its settings changed.
2. Disable the built-in application firewall and any third-party firewall, "security" software, or network filter. Failing to do this is a common mistake. Test.
3. In some versions of OS X, Parental Controls has a bug that prevents loading of secure websites. Turn it off.
4. Are the current date (including the year) and time shown on your system clock? If not, correct them and test.
5. Launch the Activity Monitor application in any of the following ways:
☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)
☞ In the Finder, select Go ▹ Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.
☞ Open LaunchPad. Click Utilities, then Activity Monitor in the icon grid.
Select All Processes from the menu in the toolbar of the Activity Monitor window, if not already selected. Enter "ocspd" (without the quotes) in the "Filter" text field. Is a process with that name listed?
If not, select
Go ▹ Go to Folder
from the Finder menu bar. Into the text box that opens, copy the following line of text:
/var/db/crls
From the folder that opens, move these two files to the Trash:
crlcache.db
ocspcache.db
You’ll be prompted for your administrator password. Reboot, empty the Trash, and test.