Merge pull request #104 from yxl/dev

Merge branch 'dev' (0.3.4 features) into 'master'
Merge branch 'dev'
Add pref for font syncing.
Version 0.3.4b
Address incompatibility with Windows XP caused by GetTickCount64().
Ensure atomicity for filterLoadedCallback().
Version 0.3.4b2
Fix URL bar icon issue with Nightly 2013-07-01.
Ignore privatebrowsingwarning when opening IE new window.
Optimize Favicon.jsm to not update favicon when unchanged.
Fix bug in needPrivateBrowsingWarning()
Version 0.3.4b3
Version 0.3.4
Merge branch 'master' into dev

Conflicts:
	extension/defaults/preferences/fireie.js
	plugin/IEHostWindow.cpp
Fix compatibility with Firefox 25's per-tab gFindBar.