![]() While this is significantly more secure (as "classic" DNS requests are sent in plain text over the network, and everyone along the way can snoop on these), this also makes all your DNS requests readable by Cloudflare, providing TRR servers. It circumvents DNS servers configured in your system, instead sending all DNS requests over HTTPS to Cloudflare servers. Disable/enforce 'Trusted Recursive Resolver'įirefox 60 introduced a feature called Trusted Recursive Resolver (TRR). Warning: The "Do Not Track" header (DNT) may actually be used to fingerprint your browser, since most users leave the option disabled. Many of these anti-fingerprinting features are enabled by this setting in the about:config: Mozilla has started an anti-fingerprinting project in Firefox, as part of a project to upstream features from Tor Browser. Fingerprinting Protection is a different, experimental feature under heavy development in Firefox. The Firefox tracking protection blocks a list of known "fingerprinters" when your privacy settings are set to Standard (the default) or Strict. It can be enabled by setting about:config: If you are already running such an ad blocker with the correct lists, tracking protection might be redundant.įirst party isolation (also called "double keying") can prevent third parties from tracking users across multiple sites. Note that this is not a replacement for ad blocking extensions such as uBlock Origin and it may or may not work with Firefox forks. trueĪpart from privacy benefits, enabling tracking protection may also reduce load time by 44%.It can be enabled in different levels via the GUI Settings > Privacy & Security, or by setting about:config: The following are privacy-focused tweaks to prevent browser fingerprinting and tracking.įirefox gained an option for Enhanced Tracking Protection. MFSA 2014-56 Miscellaneous memory safety hazards (rv:31.0 / rv:24.7)įirefox users should upgrade their browsers as soon as possible to protect themselves against these vulnerabilities.This article overviews how to configure Firefox to enhance security and privacy. MFSA 2014-57 Buffer overflow during Web Audio buffering for playback MFSA 2014-58 Use-after-free in Web Audio due to incorrect control message ordering MFSA 2014-59 Use-after-free in DirectWrite font handling MFSA 2014-60 Toolbar dialog customization event spoofing MFSA 2014-61 Use-after-free with FireOnStateChange event MFSA 2014-62 Exploitable WebGL crash with Cesium JavaScript library MFSA 2014-63 Use-after-free while when manipulating certificates in the trusted cache MFSA 2014-64 Crash in Skia library when scaling high quality images MFSA 2014-65 Certificate parsing broken by non-standard character encoding MFSA 2014-66 IFRAME sandbox same-origin access through redirect The full list of vulnerabilities fixed in Firefox 31 includes: Some of these bugs showed evidence of memory corruption under certain circumstances, and we presume that with enough effort at least some of these could be exploited to run arbitrary code,” Mozilla said. “Mozilla developers and community identified identified and fixed several memory safety bugs in the browser engine used in Firefox and other Mozilla-based products. The third critical bug is really a collection of various memory safety problems, some which could lead to memory corruption. One of the other critical vulnerabilities is an exploitable crash in the Cesium JavaScript library. This leads to use-after-free of a DirectWrite font-face object, resulting in a potentially exploitable crash,” the Mozilla advisory says. “Mozilla community member James Kitchener reported a crash in DirectWrite when rendering MathML content with specific fonts due to an error in how font resources and tables are handled. That bug lies in the DirectWrite font handling component of the browser. There are actually several separate use-after-free vulnerabilities patched in Firefox 31, although just one of them is rated critical. ![]() Three of the bugs fixed in Firefox 31 are critical, including a use-after-free vulnerability and a handful of memory safety issues. Mozilla has released a new version of Firefox, which includes patches for 11 security vulnerabilities. ![]()
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