Hello malware, I believe you have malware on your computer. And it looks like it is trying to manipulate FireFox to opening that website. My suggestion is, if you have downloaded any applications from that website, to uninstall them. And then use the standard microsoft windows anti-virus or another that is an industry standard. If you are not sure what is being run on your computer, press the keys ctrl+alt+del to open up the task manager. With the task manager you should see a list of all the programs that are running in memory. My suggestion is to disable and or end all processes that are not standard windows operating system. If you need help to know which ones to remove, post a list on this thread or give us some pics.