while (node.parentNode != document.documentElement) {
This effectively crashes the script and no more linkifying occurs after that.
In my investigation it seems the to happen because it traverses the node which is no longer part the document (its added when you hover over and then removed when the mouse leaves, before the traverser finishes parsing).
The last node before crash was a tooltip and after checking it has a null parentNode.
Uncaught TypeError: Cannot read property 'parentNode' of null (Chrome 40.0.2214.85)
This sometimes happens on youtube when quickly hovering over buttons that have a custom tooltip like this https://i.imgur.com/n5s63I7.png
https://i.imgur.com/6uV7wf0.png
at this line:
This effectively crashes the script and no more linkifying occurs after that.
In my investigation it seems the to happen because it traverses the node which is no longer part the document (its added when you hover over and then removed when the mouse leaves, before the traverser finishes parsing). The last node before crash was a tooltip and after checking it has a null parentNode.