Since we cannot have a well-encapsulated, non-leaky world without both resumable and uncatchable exceptions, and because resumable exceptions are out of scope for this proposal, I suggest that we ...

Includes special workarounds for Firefox "Error" object which has sometimes a strange behaviour.

In JavaScript try/catch/finally are called exception handling statements. In JavaScript try/catch/finally statement manage some or all of the errors that might occur in a block of code.