Obviously received very little quality assurance testing

When I browse to a typical site that requires a login, a window pops up asking for a name/pw. After these are correctly supplied,
the login succeeds, and the page appears; but the prompt window for name/pw remains in front.
And there is no way to close the name/pw window.
And then when I quit the application, the application fails to quit.
The only remedy is a force quit.
Then when I relaunch the Maxthon app, it remembers the last page visited, so it again pops up the login window.
Hopeless loop.

Guyinsb about Maxthon Web Browser