Your replicator is probably too small to replicate larger components, which would be a major inconvenience at best or a showstopper at worst. And industrial replicators are even harder to come by than starships.
Then there's getting access to the replicator patterns for sensitive or dangerous components. Dilithium chambers, weapons, Mercassium composite for shield generators, etc. are classified by Starfleet.
Then there are substances that can't be replicated, such as verterium cortenide for the warp coils. I don't think it's explicitly stated that VC can't be replicated, but we know that Voyager had to find some to refit their warp coils, they couldn't just replicate it. Also dilithium.
And finally, there's antimatter. Building a starship won't do you much good if you don't have gas for the tank. Antimatter does not occur in large quantities in nature, and probably can't be replicated (or at least not safely.) So you'd need some sort of industrial base to produce it, further complicating your plans.
Looks like compatibility hacks for various websites.
Interventions - are deeper modifications to make sites compatible. Firefox may modify certain code used on these sites to enforce compatibility. Each compatibility modification links to the bug on Bugzilla@Mozilla; click on the link to look up information about the underlying issue.
User Agent Override - change the user agent of Firefox when connections to certain sites are made.
If social media companies exist to collect massive troves of personal info from users--and they do--then there is a valid national security concern over social media controlled by an adversary. This is distinct from the individual privacy concerns towards domestically-controlled social media.
"Here come the test results: 'You are a horrible person'. That's what it says, 'a horrible person'. We weren't even testing for that!"