web developer toolbar - Why I'm not able to view the source of any js file in Google Chrome? -

this 1 works:

view-source:http://code.jquery.com/jquery-2.0.3.min.js 

this 1 not:

view-source:http://pagead2.googlesyndication.com/pagead/show_ads.js 

the network status "canceled". response headers:

http/1.1 200 ok p3p: policyref="http://www.googleadservices.com/pagead/p3p.xml", cp="noi dev psa psd iva ivd otp our otr ind otc" content-type: text/javascript; charset=utf-8 etag: 18135184975683587730 date: thu, 11 jul 2013 10:00:44 gmt expires: thu, 11 jul 2013 11:00:44 gmt x-content-type-options: nosniff content-disposition: attachment content-encoding: gzip server: cafe content-length: 6489 x-xss-protection: 1; mode=block age: 2014 cache-control: public, max-age=3600 

without "view-source" i'm able download file , view source want know why happens.

a strange thing in addition is, not possible open web delevoper tools after opening view-source url. if do, tools blank:

i'm taking guess here: has content-disposition setting in response header.

reference: http://support.microsoft.com/kb/260519.