We use a favicon (small icon that displays in the URL box) based on the rainbow version of the UUA logo. It displays as desired for example here:
When users select the PDF link there, a generated page displays to show the attachment:
The favicon that displays is an old, badly designed logo we thought we had gotten rid of.
How do we get rid of it here?
Check if there’s a favicon.ico in your root directory and delete it. The wp-content folder may be getting it from there because it wouldn’t run all the < head > content that WP generates on pages, which is where the one you specify in the customizer is displayed from.
Let us know if that works.
Yes, that did get rid of the old icon.
Now the .pdf page shows a generic blue marble in the favicon space. Ideally it would show our chosen UUA icon, but this is better than the old icon.
You might try making a favicon.ico with your new logo and adding it to the home directory to replace the old one. Not sure if it will work, but it might.