Firefox 3 has a feature by which it automatically scans the downloaded files once the download is complete. Firefox 3的有一個功能，它會自動掃描下載的文件，一旦完成下載。 This feature is good in one sense that all files will be scanned before opening, but in another sense this could be annoying if the file size downloaded is huge and Firefox takes up lot of time scanning the file.此功能是好的，從某種意義上說，所有文件將被掃描，然後才開啟，但在另一種意義上這可能是惱人的，如果下載的文件大小是巨大的和Firefox佔用了大量的時間掃描該文件。

This scanning setting can be disabled so that Firefox will not scan files after completing download.這種掃描設置可以使殘疾人的Firefox不會掃描完成後的文件下載。 This would be useful only if you have a good Anti-Virus installed.這將是有益的，只有你有一個好的反病毒軟件安裝。 To disable file scanning, open Firefox and type about:config in the address bar.要禁用文件掃描，打開Firefox和類型信息：配置中的地址欄中。

Click “I’ll be careful, I promise!” and then in the filter type browser.download.manager.scanWhenDone .點擊“我要小心，我答應！ ” ，然後在過濾器類型browser.download.manager.scanWhenDone 。 You can see a boolean value for this entry and its set a true by default.你可以看到一個布爾值為這個項目及其設定一個真正的默認。 Double click the entry and change the value to false.雙擊進入和改變的價值為false 。

Next time you download a file, Firefox will not scan the file after completing download.下一次當您下載文件時， Firefox將不掃描的文件下載完成後。 The change is instant and you dont have to restart Firefox for the effect.的變化是即時和您不必須重新啟動Firefox的效果。

Thanks謝謝 Raymond雷蒙德 for this tip.此小費。

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