Note: I\'ve read similar threads, but none quite my issue - I can right click on it fine, it just then disappears.
I find \"Inspect Element\" an invaluable tool in C
If the hover is triggered by JS, just pause script execution via the keyboard. This is a much simpler way of freezing the DOM than the other answers suggest.
Here's how you do it in Chrome. I'm sure Firefox has an equivalent procedure:
Note the shortcut to pause script execution—F8.
Interact with the UI to get the element to appear.