I'm not sure what this is offering over normal Firefox other than not having to turn off telemetry, install ublock ( and the other mentioned add-ons), and making use of user.js myself?
Also if you're making an issue of providing software with no telemetry then your website should probably not include cloud insights tech that: "collects web vitals from the actual devices your visitors are using".
Also if you're making an issue of providing software with no telemetry then your website should probably not include cloud insights tech that: "collects web vitals from the actual devices your visitors are using".