We're getting a load of crashes for bug 1400637 again on Beta, so we need to remove alternate desktop from level 4.

Pushed by bobowencode@gmail.com: https://hg.mozilla.org/integration/mozilla-inbound/rev/82305e302758 Bump Alternate Desktop to Level 5 and make that the Default on Nightly. r=jimm

Comment on attachment 8929039 [details] [diff] [review] Bump Alternate Desktop to Level 5 and make that the Default on Nightly Approval Request Comment [Feature/Bug causing the regression]: Alternate desktop in content sandbox (bug 1229829) [User impact if declined]: People with certain anti-virus applications get intermittent or constant crashes of the content process (bug 1400637). [Is this code covered by automated tests?]: This is a trivial logic change to remove the alternate desktop but keep some other sandboxing measures. [Has the fix been verified in Nightly?]: This will not affect Nightly. [Needs manual test from QE? If yes, steps to reproduce]: No, as no change on Nightly and on Beta we can rely on the massive reduction in the crash rate. [List of other uplifts needed for the feature/fix]: None [Is the change risky?]: No [Why is the change risky/not risky?]: Very simple logic change. [String changes made/needed]: None

Comment on attachment 8929039 [details] [diff] [review] Bump Alternate Desktop to Level 5 and make that the Default on Nightly Let's take this and see how it goes in Beta58. Beta58+.