Simplify ChromeActions.isInPrivateBrowsing to not rely on the global PB service
Update zh-TW l10n strings: copied from latest mozilla-central
Added localization for greek language
Merged my translation with translation found in http://mxr.mozilla.org/l10n-mozilla-release/source/el/browser/pdfviewer/viewer.properties
Lowering warning to info
Merge pull request #2498 from ehsan/pbcleanup

Simplify ChromeActions.isInPrivateBrowsing to not rely on the global PB service
Merge pull request #3275 from timvandermeij/lower-warning-to-info

Lowering warning to info
Merge pull request #3237 from moztw/master

Update zh-TW l10n strings: copied from l10n-central
Merge pull request #3247 from antapos/greeklangsupport

Added localization for greek language