1. I was on StackOverflow looking at a tag-filtered tab.
  2. I already had more than could be displayed, but it listed them from the bottom.
  3. Clicking on the list allowed me to scroll to the end and add a new one.
  4. I then clicked save.

It won't stop looking like this:

Image showing the bug

I have tried:

  • Switching (SO) tabs
  • Refreshing the page
  • Refreshing the page with cache bypass
  • Closing the browser tab and opening a new one
  • Closing the whole browser and re-openig
  • Putting the cursor in the box and trying to move it left


  • Mozilla/5.0 (Windows NT 10.0; WOW64; rv:45.0) Gecko/20100101 Firefox/45.0
  • No user JS or CSS
  • uBlock Origin

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