By default the icon is places in the tab bar. If you are using an extension that hides or modifies the tab bar you will need to temporarily enable the default tab bar in order to see and move the icon. If you are using the default tab bar and the icon isn't showing up then something unusual is going on and will need to be troubleshooted. Please make an issues here https://github.com/Aaron-P/ToggleResistFingerprinting/issues to discuss it.