Re: inline declarative manifest, was Re: New manifest spec - ready for FPWD?

On Tue, Dec 17, 2013 at 5:06 PM, Boris Zbarsky <bzbarsky@mit.edu> wrote:

> On 12/17/13 3:29 AM, Jonas Sicking wrote:
>
>> This is a good point. Would this have performance implications for
>> down-level browsers? I don't know if prescanners etc in contemporary
>> browsers are smart enough to ignore <script> tags that use a non-JS
>> type attribute.
>>
>
> Gecko's is not.  Not least because as far as I can tell scripts with
> unknown type are in fact always loaded, just not executed, and block the
> parser while they're loading, so you do in fact want to preload them!


Is there a good reason the parser is blocking on such scripts?