Do you have the same issue with Firefox in Troubleshoot Mode? https://support.mozilla.org/en-US/kb/diagnose-firefox-issues-using-troubleshoot-mode#w_how-to-start-firefox-in-4troubleshoot-modesf5safe-modesf

Did you try clearing the browser cache? https://support.mozilla.org/en-US/kb/how-clear-firefox-cache#

Sites load fast for me. see screenshots Here is the add-on I'm using to show load time. https://addons.mozilla.org/en-US/firefox/addon/load-time/ Post similar screenshots please.

What OS? Run this DNS test, could possibly find something faster. see screenshot for download https://www.grc.com/dns/benchmark.htm

thanks for the help. It worked better in troubleshoot mode but I don't know why. Ran DNS test - didnt show any issues. I'm not that conversant with this setup in Mozilla

thanks for the help. It worked better in troubleshoot mode but I don't know why.

Sounds like an add-on is causing the slowness. If you post a screenshot of the your browser in normal mode it would easy to see which add-on(s) are the issue.