Flash Player upgrade
A: Maxthon comes with a version of Adobe Flash to ensure the browser can play all Flash content upon installation, although this version might not always be the most recent.
To fix this issue, make sure to install the most recent version Adobe Flash from http://get.adobe.com/flash;
Then enable "Allow all sites to run plug-ins" option in Settings > Advanced (MX4 and earlier) or Settings > Privacy & Content.
If the issue persists, please refer to this post for detailed step-by-step solution http://forum.maxthon.com/index.php?/topic/13262-adobe-flash-and-maxthon/.