To install Firefox on a Windows XP system, because of Windows restrictions, the user will have to download Firefox 43.0.1 (SEE: For advanced users: download the Firefox 47.0.1 Windows English (US) full installer) and then update to the current release. - Note FF 47.01
FireFox: Internet Browser; Truly Private Browsing with Tracking Protection
Full Page Screenshot Firefox Tool - Video - Captures the Whole WebPage, not just the visible part, no add-on necessary.-Blog