Steps to reproduce: 1. Start Firefox with clean profile. 2. Make sure .zip to ask always when download. 3. Open http://ftp.mozilla.org/pub/mozilla.org/firefox/tinderbox-builds/mozilla-inbound-win32/xxxxxx 4. Click firefox-19.0a1.en-US.win32.zip(say file A) 5. Chose "Open with" 7-zip (for ex.) 6. Click OK 7. Open http://ftp.mozilla.org/pub/mozilla.org/firefox/tinderbox-builds/mozilla-inbound-win32/yyyyyy 8. Click firefox-19.0a1.en-US.win32.zip(say file B) during File A is downloading 9. Chose "Open with" 7-zip (for ex.) 10. Click OK 11. Pause B 12. Resume B during downloading file A 13. Open http://ftp.mozilla.org/pub/mozilla.org/firefox/tinderbox-builds/mozilla-inbound-win32/zzzzzz 14. Click firefox-19.0a1.en-US.win32.zip(say file C) after File A finished downloading but during File B is downloading. 15. Chose "Open with" 7-zip (for ex.) 16. Click OK Actual result: File A and B are opened with 7-zip Downloading File C fails. And the following error dialog pops up. >%Temp%firefox-19.0a1.en-US.win32-nnn.zip could not be saved, because you can not change the contents of that folder. > > Change the folder properties and try again, or try saving in a different location. Expected results: File C should be opened with 7-zip as well as File A and B.
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