Nothing you said is actually a justification for MS's actions.
> Is it legal for Mozilla to distribute Adblock on their site which is a program that disables Youtube and Google ads and hurts content creators?
Yes. This is because AdBlock is a service that modifies the way your own browser - your property - works. It is not in itself a service that pulls YouTube content from YouTube.
For this same reason, it is available even in the Chrome Web Store itself.
I don't understand how you can say "so what" to pointing out that one of these companies is acting illegally, and expect to be taken seriously.
Also I think you meant to say "Google" in your last sentence instead of "Microsoft"? I can't tell and it doesn't seem to make sense otherwise.
> Is it legal for Mozilla to distribute Adblock on their site which is a program that disables Youtube and Google ads and hurts content creators?
Yes. This is because AdBlock is a service that modifies the way your own browser - your property - works. It is not in itself a service that pulls YouTube content from YouTube.
For this same reason, it is available even in the Chrome Web Store itself.
I don't understand how you can say "so what" to pointing out that one of these companies is acting illegally, and expect to be taken seriously.
Also I think you meant to say "Google" in your last sentence instead of "Microsoft"? I can't tell and it doesn't seem to make sense otherwise.