File was indexed but retrieval does not work

I had attached file
https://sites.google.com/site/pbibliograf4/2010_+The Structure and Dynamics of Cocitation Clusters A Multiple-Perspective Cocitation Analysis.pdf?attredirects=0&d=1
to a record. It was indexed - yes. When i tried to search for example word burst, the results was:
Zotero stand alone - OK
Zotero for FIREFOX - not found
Zotero for FIREFOX portable - not found
By the way for other pdf files indexing and retrieving is OK
What is wrong with this file?
(Zotero 4)
Thank you
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