Firefox not connecting and opening pages. Says network or something is un secure

[Mason Methot]

I tried everything Mozilla told me to do and I even uninstalled the browser and reinstalled but I still get the error message.
http/imgur.com/Ad7tUZ5

What can I do!?

TIA

 

[computertech82]

if you goto advance does it allow to to continue to the website?

 

[Mason Methot]

if you goto advance does it allow to to continue to the website?

No it doesn't. This happens when I open up Firefox and when I click go back it will bring me to the Firefox homepage but if I type something in it will bring me to an internet connection problem page.

 

[Mason Methot]

Or the same page again.

 

[Tradesman1]

Is the Date on your computer correct?

 

[Mason Methot]

Is the Date on your computer correct?

Ya, of course.