When enabled the Norton Safe Web extension causes Firefox home page to take ages to load. With it disabled Firefox home page loads much quicker. As a work-around, because Norton relies on Norton Safe Web for protection from malicious and phishing websites, I have installed BitDefender TrafficLight. Not only does Firefox home page load far quicker, but Trafficlight also displays a 'TrafficLight' icon in Google search results. Something the old Norton toolbar used to do but the developers chose not to include with their new extension for some reason. Perhaps to convince some to use Norton Safe Search, powered by Ask.
After my experience with Firefox I tried out the same extension replacement in Brave browser, a Chromium fork. I was not surprised to see Brave opening much faster too.
Over to you, Symantec. Or should I say, 'Norton' now?