Hi, this is part of the customisation process that Team Zorin use - to get Firefox how you want it, get your menu bar showing by pressing 'F10' (by the way, any browser that has a menu bar that is hidden by default, F10 will make it show) then click on 'View | Toolbars and select 'Menu Bar'.
Now click on 'Tools | Options' and the General Tab will open:
Now you can change the Home page to an address you like or choose from two alternative optinons:
To view the uploaded screenshots, right-click and open in new tab or double-click to enlarge/goto jpg window - note if you close it after this second option of viewing you will have lost the thread and closed link to Zorin - I do wish Zorin forum would open links in new tabs like my local City Froum!