Anytime I go to Firefox on my OnePlus 7T and hit the menu icon, I'll then go hit the share icon and then "Copy to clipboard". Following that, I'll get an error message saying "Unable to share to the indicated app". This feature has always worked, and then I moved to my OnePlus and now it doesn't. I'm wondering if there is a setting in about:config that toggles this, but I don't know enough to tweak it.