I have a PDF file which when viewed through the firefox pdf previewer causes a page title to be created that seems to be constructed from attributes taken from the PDF. For example, for the document; http://www-content.oracle.com/technetwork/products/clusterware/overview/oracle-clusterware-12c-overview-1969750.pdf I get a page tile (or a tab title if using tabs) of; Microsoft Word - Oracle_Clusterware_12c_WP - oracle-clusterware-12c-overview-1969750.pdf I have cleaned my my recent history of "cookies" and "cache" without it making any difference. The title seems to be created by the PDF previewer. If a title must be created then it should just be the doc title itself or a combination of the doc title and file name. It should not include the authoring tool.