Forum d’assistance Firefox

I'm on an iMac desktop using OS X 10.7.5 running Firefox Legacy as my browser, and I have Norton Internet Security running as well.

Lately I'm getting the "Your browser is being managed by your organization" message.

This is my personal computer since I bought it in 2012 and it's never been out of my house.

Quite a few websites refuse to load properly. Linkedin, for example. After entering the password, I can't get the actual web page to appear; all I get is a progress wheel running to infinity.

How do I change this "browser being managed" setting?

NOTE: I've searched and I don't have a policies/json file on my machine.

I imported my bookmarks from an HTML file but they are not showing even after I close and restart the browser. Where are my bookmarks? And furthermore, your instructions for importing them in the first place did not work for me because the sequence and pictures did not match what I saw in my browser. I played around with it until I found the import part. And yet, no bookmarks.