On a Mac, only Safari mostly always works, with Chrome next. Firefox and Brave (based on Chrome) watch your privacy, but also often have problems. Mac Edge is new, and I haven't tried it much. I use Brave and Firefox mostly, but realize I may have to switch to Safari or Chrome if its something important. Firefox and Brave (at least) screwup with Cocoontech. ALWAYS copy your post before pressing "POST" just in case it screws up and you have to repost it, or you will be picking HTML codes out of your reply.