Shopping on some sites.
I have found that on some shopping sites I can not place items in my cart. Wrangler jeans site is one. While on Edge, no problem. In Firefox I can maneuver on the site but can not add items to my shopping cart.
It works for me. see screenshot Sounds like you're blocking something. Have you tried in Safe Mode? https://support.mozilla.org/en-US/kb/diagnose-firefox-issues-using-troubleshoot-mode#w_how-to-start-firefox-in-4troubleshoot-modesf5safe-modesf