Add back sb.prop.date since some addons may use it (eg. CopyPageInfo)
Fix: erroneous API copyUnicharPref(), setBoolPref(), setUnicharPref()
Fix: frame with malformed URI cause the capture terminated.
Reduce a workaround with native API call.
Use lang pack for an alert message.
Add back RELEASE.txt
Update version info.
Merge branch 'hotfix-1.12.0a24'