Last night, when I got home from work, my Firefox browser wouldn't let me make any Google searches or log into my Google account. It just keeps coming up with the end of file error. I've refreshed Firefox, created a new profile, turned off Proxy, uninstalled NordVPN, and even tried to uninstall/reinstall Firefox. After refreshing, I can sometimes search with Google for a little bit until I try to log into my Google account or navigate to Gmail while not logged in. It also won't let me access Yahoo.com, it seems. It will do random websites, though. For example, I entered the url for a video game forum I've browsed in the past and it loads that okay. Any suggestions? Do I have a virus or something? I honestly can't figure this out.