Firefox cannot drag and drop links to open new tabs and select text for search.This is a very useful feature, multiple computers have failed. I hope the engineer can help me take a look. Thank you. Suspected to be caused by the Add-on Manager.
I temporarily use the ’Quick Drag we' plugin instead. I have the same problem as you. My solution is to turn off the "Allow Dragging" option in the 'Add-on Manager', so that only one page can be opened. Overall, the the problem may be caused by the u...