Thanks for posting, but people will find something else stupid to complain about, because there is pretty obviously a storm of propaganda against Firefox, which I very much suspect is driven by interests that are against an open and free internet.
Blocking these features may calm some people, but in reality, none of these features were used for anything unless specifically used by the user. So the claim of it making Firefox slower or using more resources or being used for telemetry were all outright lies.
A sentiment is tried to be created that Firefox is just as bad as Chrome, Edge, Brave and Safari when nothing could be further from the truth. But even people who consider themselves IT savvy are falling for it. 🙁
Interestingly these attacks on Firefox coincide with Chrome getting steadily worse, forcing Googles own standards and preventing plugins that block advertising, while reducing functionality for Firefox on Google/Alphabet owned sites.