Bug#861373: blank screen when viewing pdfs

[Jyotirmoy Bhattacharya]

Package: firefox-esr
Version: 45.8.0esr-1

I cannot view any PDF files in Firefox. On visiting a URL with a PDF file
the PDF viewer interface appears but no content is shown. The area where
the content should appear remains black.

On loading a file with the web console open the console shows an error

    SyntaxError: missing : after property id

at location 1512:16 of resource://pdf.js/web/viewer.js

Tools>Add ons shows PDF Viewer extension version 1.8.275. I have disabled
all other extensions.

Jyotirmoy Bhattacharya
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