bug 1080877 - Use low-res firefox background on mobile
Fix bug 1090331: Don't use exact stylus path
fix bug 968367 - make sure the Last-Modified response header is correct when serving wiki uploads.
Merge pull request #2905 from jezdez/bug968367

fix bug 968367 - make sure the Last-Modified response header is correct when serving wiki uploads.
Merge pull request #2860 from openjck/1090331-compile-stylesheets-path

Fix bug 1090331: Don't use exact stylus path
Merge pull request #2896 from darkwing/1080877-lowres

bug 1080877 - Use low-res firefox background on mobile