If the Firefox Hello button is missing from your toolbar or menu, check these tips to make it appear.
Check the Additional Tools and Features drawer to see if the button is there. You can move it from there to a spot that's convenient for you.
Here's how to move the Hello button:
If you're on a Private Window (indicated by a mask icon), the Firefox Hello button won't appear.
Close the Private Window and use Firefox in regular browsing mode.
Setting up Firefox to "Never remember history" is equivalent to always being in Private Browsing mode. In order to change that:
Hello is not available in Firefox ESR (Extended Support Release) versions which are meant for large organizations, such as universities, city governments and businesses. See the Firefox ESR page for more information.