Because many "techies" want something more advanced. I use a bunch of extensions to improve my experience (NoScript, uBlock Origin, HTTPS Everywhere, Bitwarden,

Because many "techies" want something more advanced. I use a bunch of extensions to improve my experience (NoScript, uBlock Origin, HTTPS Everywhere, Bitwarden, Vimium etc). You could argue that many of these features should be built in (eg adblock) but not all of them (eg vimium). You don't have to install extensions if you don't want them. They're not walled gardens. I can install Firefox extensions without ever browsing any of Firefox's websites. I agree there should be no telemetry but there are FF forks with that removed.