Totally agree with the first. The last one - isn't that already the case? The browser treats the server as hostile and often overrides what it wants to do with

Totally agree with the first. The last one - isn't that already the case? The browser treats the server as hostile and often overrides what it wants to do with extensions. The issue with additional modularity would seem to be that things would become less hackable in general, because you'd have less insight into the internals of modules as there would be more variety and they might not be open source. How does ad blocking work if the core infrastructure doesn't know much about what's being rendered?