I have noticed that with the upcoming Firefox 32, which is currently in Nightly state, the browser will use Google's safe browsing database to check files you have downloaded from the Internet. For every executable file you download, Firefox will perform a check against the online database which is provided by Google. The current version of Firefox 31 also ships with a similar option, but it uses a local database and does not send any request to Google's sites. Firefox 32 will continue to use the local database, however, if the downloaded file isn't found in the local database, Firefox will send the information to Google. You might be interested in disabling this behavior due to privacy concerns. Here's how you can turn it off.
The details which Firefox will send to Google will include the file name, the file size and the download URL. It will also include a hash value calculated from the information above. So, Firefox will be able to reveal the information about your downloads to Google. To disable this,
- Open a new tab and enter the following text in the address bar:
Confirm that you will be careful if a warning message appears for you.
- Enter the following text in the filter box:
- To disable requests to Google's safe browsing database, set the parameter browser.safebrowsing.appRepURL to an empty string. Just double click it and remove the whole text.
- To disable the safe browsing feature completely, just set the parameter browser.safebrowsing.enabled to false.
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