Not only is it theoretically as bad as it sounds, its as bad as it sounds in reality as well. Most of the top extensions get sold to ad companies and silently s

Not only is it theoretically as bad as it sounds, its as bad as it sounds in reality as well. Most of the top extensions get sold to ad companies and silently start sucking up all of your browsing data to sell on. Some of them start injecting their own adverts and tracker scripts on to pages, some of them are outright stealing your credentials. And you realistically have no way to sort the good from the bad. Especially when the good silently get sold to the bad and automatically updated.