Firefox not opening certain pages

[Zoom7000]

I've noticed an issue in the last couple of days on my home PC. My default browser is Firefox and it's stopped opening certain pages correctly and in some cases not at all. Tried to view Twitter.com (https) and TheVerge.com (not https) and this is what I am getting...

 

The Verge:

 

Twitter:

 

And certain https pages won't open at all. For example, the Mozilla support pages (https://support.mozilla.org/) give me the following error message:

 

All the pages work fine in IE and Chrome. I have tried uninstalling/reinstalling Firefox (also deleting the profile folder from %APPDATA%) with no luck. Any ideas how I can resolve this?

[+Zlip792 MVC]

- Fix Date & Time as mentioned: http://www.genuinescope.com/blog/sec_error_ocsp_future_response/

- Clear Cache and Cookies and Try Ctrl+F5 to force flush cache and redownload JS/CSS and Images.

- Try changing your DNS to some public DNS like OpenDNS and Google DNS

[Praetor]

your clock is on the 17/04??

 

that is the problem..

[Torolol]

well it did said OCSP.. so

in Certificates validation option, uncheck the "use OCSP sites to validates the certificates".

Its less secures but lot faster.

 

Chrome & IE didn't use OCSP either.

 

If you can't find the option i mentioned above, alternatively you can also do this:

 

type this in url bar:

about:config

 

looks for:

security.OCSP.enabled

 

when you find it, double click it, and change the value to: 0

 

That will disable the OCSP.

[Zoom7000]

Thank you guys. That was an EPIC FAIL on my part! (And my computer!) - No idea why the date was set to 17/04. Corrected and now working fine!

[Praetor]

please mark the answer so next fellow that does a search can see it.