My mom went onto MY computer and blocked webpages that I use regularly, like yahoo (it took me a while to figure out how to get in here), myspace, any music site. Actually, my mom didn't do it, my sister did. I use Firefox, how can I unblock them? There is no reason for her blocking these randoms pages, that's why it ticks me off so much. I'm almost 18 and this is MY computer that I'm letting HER use. Please help me out?