I have a 5 year old laptop crawling on its knees when browsing Wired and some other sites heavily loaded with way too much JS and subsequent http calls. XP+off

I have a 5 year old laptop crawling on its knees when browsing Wired and some other sites heavily loaded with way too much JS and subsequent http calls. XP+office 2010+20ff tabs are running fine on it but forget about win7/8.x and more than 2 tabs.