Hello FFAXX.

All you need to to is to update to version 66.0.4 ....

If you haven't already, go to 3-bar menu => Help => About Firefox - you should be ready to update now (or any minute).

After that everything should be back to normal.

See : https://www.mozilla.org/en-US/firefox/66.0.4/releasenotes/?utm_source=firefox-browser&utm_medium=firefox-browser&utm_campaign=whatsnew

I want to continue to run v56... will i be able to use the addons i once had ??

Hi ttles714, currently there's no update for Firefox 56. There was a note on Twitter that Mozilla may release something for unsupported versions, but for the time being, you would need to install the new certificate for verifying extension signatures a different way, such as installing manually. For an unsupported approach, see: https://support.mozilla.org/questions/1258165#answer-1218833

Thanks !!!! Step 2 seams to have worked ... I will see if it continues