Pay for what? Since you posted this in the (desktop) Firefox section, the Firefox web browser for Windows, macOS, and Linux is 100% free to download and use from Mozilla. You can even download the source and build it yourself. https://www.mozilla.org/firefox/all/#product-desktop-release Mozilla does have a few premium products that you have to pay to use which are [https://www.mozilla.org/products/vpn/ Mozilla VPN], [https://fpn.firefox.com/ Firefox Private Network (only in US)], [https://relay.firefox.com/ Firefox Relay] [https://developer.mozilla.org/en-US/plus MDN Plus]. If you need support for one of these premium products then please post in the appropriate forum sections for them. https://support.mozilla.org/en-US/questions/new