Any issues popping up (especially from the old version of Android)?

Are they still making those or are they all 5+ years old (2019 was latest I could find on eBay)?

I just found it recently when DFWP failed to allow me to paste on a site (which happens quite often in my experience). I had the same thoughts about this setting but so far I haven’t noticed anything. I keep it open in a tab in case I need to toggle it though.

In about:config, set dom.event.clipboardevents.enabled to false.

You don’t need this - In about:config, set dom.event.clipboardevents.enabled to false. No Addon needed.

deleted by creator

*baited

Bated would have been a very different affair

Sideberry is a particularly useful extension for this, especially if you have an ultra wide monitor