Apparently this happens with Zhongwen. Check if it happens to us:
Sometimes when I have the extension off the sites I visit generate the following error on every mouse move event:
Uncaught TypeError: Cannot read property 'clientX' of undefined
at Object._onMouseMove (content.js:813)
at HTMLDocument.onMouseMove (content.js:781)
Line 813 is the following:
if (tdata.clientX && tdata.clientY) ...
tdata is assigned on line 784:
var tdata = window.zhongwen;
Apparently this happens with Zhongwen. Check if it happens to us:
Sometimes when I have the extension off the sites I visit generate the following error on every mouse move event: