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?

[ZeroHour]

Is your pc date accurate?

[Zoom7000]

Yeah, correcting the date solved the issue. I have no idea how or why the date changed, but I've corrected it now and all is good again!

[ZeroHour]

Yeah, correcting the date solved the issue. I have no idea how or why the date changed, but I've corrected it now and all is good again!

 

More worrying is the fact IE and chrome continued happily.

[Zoom7000]

Maybe Chrome and IE have OCSP disabled by default?

[ZeroHour]

Maybe Chrome and IE have OCSP disabled by default?

 

I know Chrome does support it but its off by default but it has been in it for ages, I thought they would have turned it on by now though.