This is as of the 32.0b'''9''' and it has been fixed and will be in the next 32.0 build, likely the 32.0 RC1 build though normally such a fix would be a Beta build like 32.0b10. The Release is next Tuesday so little time. in '''about:config''' you can try modify the value for browser.safebrowsing.appRepURL to be blank in meantime. For reading as not useful comments are bug/email spam. [https://bugzilla.mozilla.org/show_bug.cgi?id=1057764 Bug 1057764] - Download Manager regression in FF32 beta 9 update