There are two scenarios: '''(1) There is a shortcut for the page already and you want to lock it to a specific location''' Hover your mouse over the icon until a little ... menu appears at the top right of the icon. Click that to get a menu with a Pin option. Then you can drag it to your preferred location. '''(2) There isn't a shortcut for the site so it needs to be added''' The only way I know to do it is to choose a shortcut you don't care about and manually edit it: (a) Copy the URL of the page from the address bar (you'll paste this later) (b) Hover your mouse over an icon until a little ... menu appears at the top right of the icon. Click that to get a menu with an Edit option. (c) Enter a caption for the shortcut and paste the URL of page then click Save. Firefox should fetch the site icon automatically. See: [[Customize items on your Firefox New Tab page]]