The Firefox built-in VPN is offered in stages to users in the U.S., U.K., Germany and France, as mentioned in the [https://www.firefox.com/firefox/149.0/releasenotes/#:~:text=built-in%20VPN Firefox 149 release notes]. It is also offered to users in Canada, starting in [[Find what version of Firefox you are using|Firefox version]] 150. It is not available to everyone, even if you are in one of these locales. If the built-in VPN is available, you would see a VPN icon in the top-right corner of the toolbar, that opens a prompt to turn on the VPN. You would also need to sign in to a Mozilla account. For more infomation, see the [[Use built-in VPN in Firefox]] article. If you wish, you can post your feedback about the Firefox built-in VPN to the [https://connect.mozilla.org/t5/discussions/introducing-firefox-s-built-in-vpn-ip-protection-now-in-the/td-p/120550 Mozilla Connect thread].

This is what worked for me (thanks ChatGPT): Type this in the address bar: '''about:config''' Accept the warning. Search for: browser.ipProtection.enabled Set it to true. Restart Firefox, or wait a few minutes and check Customize Toolbar… again.