Problem with Firefox’s new built-in PDF viewer and

Annoyingly, within the last month or so, Firefox has switched it’s default PDF viewer to it’s built-in renderer. Generally, this is a good thing. It means that eventually we won’t need to all have Adobe Reader on our computers. But, annoyingly, this built-in renderer has issues with multiple PDF files, including those generated by our bingo card generating website,

For now, we have added a warning prompt for Firefox users to tell them why their bingo cards are missing the numbers or words within the grid. And now, the harder part, trying to figure out what part of the PDFs we use are incompatible with Firefox.

This is hugely annoying.

For anyone who stumbles on this, this page gives information on debugging pdf.js (the basis for the embedded FF viewer):

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