Security/Download Protection
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Description
This feature protects users against malware downloads. It is based on Safe Browsing.
See Security/Features/Application_Reputation_Design_Doc for implementation details.
Prefs
- browser.safebrowsing.appRepURL: server endpoint for remote lookups
- browser.safebrowsing.downloads.enabled: enables application reputation checks for downloaded files
- browser.safebrowsing.downloads.remote.enabled: enables remote lookups (requires the previous pref)
- browser.safebrowsing.downloads.remote.timeout_ms: timeout for the remote lookups
- browser.safebrowsing.malware.enabled: enables malware checks (required by application reputation)
- urlclassifier.downloadAllowTable: list of trusted certificates which suppress remote lookups (Windows-only)
- urlclassifier.downloadBlockTable: list of URLs serving malware binaries
Firefox 43 and later:
- browser.safebrowsing.provider.google.lists: list of tables coming from the Google Safe Browsing service
Engineering
Most of the code lives in toolkit/components/downloads/ApplicationReputation.cpp.
QA
To turn on debugging output, export the following environment variable:
NSPR_LOG_MODULES="ApplicationReputation:5"
Documentation
- API Documentation available internally under NDA
- Content-Agnostic Malware Protection (paper describing how the whole system is implemented)
- Chromium source code
- Announcement blog post