Step to reproduce: 1. Go to a AppCache enabled website, make sure it's cached 2. Verified it is AppCache'd by checking about:cache?device=offline 3. Delete the HTTP cache (Preference -> Advanced -> Network -> Cached Web Content -> Clear Now) 4. Go offline (File -> Work Offline) 5. Go back to the website, it should load from AppCache 6. View source (cmd+U) Expected result: * view the source code Actual result: * Problem loading page == It's very tricky to reproduce the behavior in Firefox, but in B2G Gaia we test our apps by inserting offline AppCache directly into the profile with a fictitious hostname, that makes the behavior easy to surface (with the view source hardware key from in our dev preview phone) Is it possible to make view-source to access not only HTTP cache but also AppCache?

No, this was in the right place. Necko is what's not hitting the appcache here. The toolkit code is just using the APIs core exposes for this stuff.

(In reply to Boris Zbarsky (:bz) from comment #1) > No, this was in the right place. Necko is what's not hitting the appcache > here. The toolkit code is just using the APIs core exposes for this stuff. Oh thanks.

I'll look at this. I suspect this may be complicated, though...

It was damn easy! :) Just let nsViewSourceChannel implement and forward nsIApplicatonCacheChannel.

Comment on attachment 623113 [details] [diff] [review] v1 r=me

Comment on attachment 623113 [details] [diff] [review] v1 https://hg.mozilla.org/integration/mozilla-inbound/rev/c5023518db2f

This patch may have triggered a new intermittent leak in mochitests (bug 754588). Any thoughts on whether or how that might be related?