While I agree, most people fail to see the bigger picture. They use Firefox to prevent Chromium from having a monopoly for browser features, but what they fail to see is that in most cases, Google already has full control. If Chromium browsers get a feature, Firefox will inevitably implement it in Gecko and the browser so that users don’t say things like “Firefox sucks”. Firefox does not suck, Google and their monopolistic practices suck. Now it does provide some practical benefit, for example when Google decides to introduce a more restricted version of a pre existing feature, Firefox can opt to keep on using tje less restricted version as well. The most prominent example of this is the whole Manifest v3 mess. But with something like Web Environment Integrity (or as many, myself included, call it, DRM for the Web), Firefox will inevitably adopt it after Google does, so as to not have users upset and leaving.