What do you mean in blocked, can you attach a screenshot?

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Thank you!

I get something in the right hand corner when I try to go forwards or backwards in the websites that says: Block site: This website or elements thereof are on the blocksite blacklist (or not on the whitelist) and have not been loaded. It flashes then goes away. When I tried the instructions found at the following it didn't work. It is actually doing it for all websites now.

Sorry the file wouldn't upload trying again

I should mention I also tried restoring form my time machine and that won't work either. Though I may not be doing that properly. I'm on a MAC.

Looks that you have an extension installed that can block websites (BlockSite).

You can check its settings in Firefox/Tools > Add-ons > Extensions

• https://support.mozilla.org/kb/Troubleshooting+extensions+and+themes

That is caused by the Blocksite addon, uninstall it, see the article below.

• Tools => Addons remove it from there then restart firefox.

If that doesnt work troubleshoot in safe mode.

• Diagnose Firefox issues using Troubleshoot Mode

That isn't a standard Firefox feature, it's part of an extension.
https://addons.mozilla.org/en-US/firefox/addon/blocksite/?src=ss

Sorry, I don't use that extension so I can't help you with it. Read the limited instructions for that extension on the download page under About this Add-on or visit the Support Site for that add-on.

IMO, you might want to consider disabling or removing that extension if you can't get rid of the block. Just recently that extension has become "sketchy", with many user complaints about the hidden data it sends to the new developers who took over / purchased that add-on from the original developer.

I don't even know how it got on there. I certainly didn't add it. Thank you to all. You just relieved my stress by 1000%.

Really, thank you.