Some debuggers are definitely going to help cut down the development time as they support precisely detect a problem. The debuggers range from Network Sniffing, CSS Errors, Javascript Errors and network resources consumption.
error
Bugs are Awesome!
As a developer, you already expertise on how to solve a particular problem. But, productivity lies on understanding the problem exactly. Being a developer you know it how to solve only after you know what is the real trouble. So, welcome the bugs; they are your multipurpose opportunities.