BUG with video Pop-up
There has been a bug with the video pop-up window in the past several versions and since it's not yet fixed, I am making a bug report here and listing steps to reproduce the issue.
Use Maxthon to save any web page to your hard drive as HTML or MHTML, for example this forum thread; just press CTRL+S and save.
Go to some video website, for example YouTube, play some video, hover the mouse over the video and then click Pop-up to open the video in a pop-up frame. Then close the pop-up frame either by clicking on the X in the upper right corner or by clicking "Back to tab" in the lower left corner. The pop-up frame will disappear and the video will return back to the YouTube page.
Go to Windows Explorer and double-click on the saved *.html or *.mhtml file that you saved in step 1, to open it in Maxthon. If you don't have the .html or .mhtml extensions registered to open in Maxthon, do that first.
You will see the previously closed video pop-up frame open again by itself with nothing playing inside (black). But this time you can't close it with the X, only with the "Back to tab". This happens for every (M)HTML file you open from disk, as long as the original page that first opened the pop-up is open.
Please fix.