After the fix for bug 1182569, I noticed a problem where after loading about:sync-log, clicking on the file:// link "Up to higher level directory" causes a hang. Christoph, shall I file a new bug or will that be covered by this one? If you have an updated patch, I could give it a try. The patch from comment 5 didn't apply cleanly for me. Note: On Mac, to test the fix for this, you'll need to set security.sandbox.content.level=1. Using level=2 prevents the content process from being able to read. And level=2 is limited to Nightly for now. Mozregression conclusion: 13:43.96 INFO: Oh noes, no (more) inbound revisions :( 13:43.96 INFO: Last good revision: 9307d60e21ba70f46fb47c9eb43b6b5246b7e64c 13:43.96 INFO: First bad revision: d31df518cb6ec920cf9ab7accb67682298f8a9f8 13:43.96 INFO: Pushlog: https://hg.mozilla.org/integration/mozilla-inbound/pushloghtml?fromchange=9307d60e21ba70f46fb47c9eb43b6b5246b7e64c&tochange=d31df518cb6ec920cf9ab7accb67682298f8a9f8

Apologies for the confusing lack of context in the bug description. The description was pasted from bug 1331686 https://bugzilla.mozilla.org/show_bug.cgi?id=1331686#c7 which is a related problem.

Does this reproduce with the separate process for file:/// turned off?

Also looping in Mark and Kit because this affects sync things.

(In reply to :Gijs from comment #2) > Does this reproduce with the separate process for file:/// turned off? Yes, still reproducible. (I set browser.tabs.remote.separateFileUriProcess to false and restarted. Confirmed on Mac and Windows).

Thanks for filing this! Looks like a dupe of bug 1329032. Are you still able to reproduce in the latest Nightly?

(In reply to Kit Cambridge [:kitcambridge] from comment #5) > Thanks for filing this! Looks like a dupe of bug 1329032. Are you still able > to reproduce in the latest Nightly? Yes, it does appear to be fixed for me with the latest Nightly. I tested on Windows and on Mac (with security.sandbox.content.level set to 1.) Thanks. $ hg parent changeset: 330298:3cedab21a7e6 user: Carsten "Tomcat" Book <cbook@mozilla.com> date: Fri Jan 20 15:25:25 2017 +0100 description: merge mozilla-inbound to mozilla-central a=merge

Note that this was basically a duplicate of bug 1329883, as far as I can tell...