Copy link in context menu works intermittently
When I select the "Copy link" option in the context menu on any webpage, it is about a 70% chance that the link is actually copied to the clipboard. The other 30% of the time, the clipboard retains its previous content. This problem has been occurring for about 6 months, through multiple Firefox upgrades.
My sense is that the problem occurs on tabs that have been open a long time. I don't think it matters which website I attempt to test.
I can repeat this problem right now. I can copy every link on this page. However, in another window I have open, which has been open for a long time, I cannot copy any link on that page.
Any ideas how to fix this problem?