Advanced Settings :: Privacy Settings

0: Never send the referring URL (maximum privacy; breaks some sites) 1: Send only when links are clicked 2: Send for links and images (default) 0: Always send referrer (default) 1: Only send if base domains match 2: Only send if hosts match 0: Send full URI (default) 1: Scheme, host, port and path 2: Scheme, host and port 0: All cookies are allowed (default) 1: Only cookies from the originating server are allowed 2: No cookies are allowed 3: Third-party cookies are allowed only if that site has stored cookies already from a previous visit 0: The cookie's lifetime is supplied by the server (default) 1: The user is prompted for the cookie's lifetime 2: The cookie expires at the end of the session (when the browser closes) 3: The cookie lasts for the number of days specified by network.cookie.lifetime.days true: Spoof the referrer and use the target URI instead false: Send the referrer (default) true: May leak information to third-party sites through Firefox's Network Prediction features (default) false: Prevents leaking information to third-party sites through Firefox's Network Prediction features true: Third-party cookies are allowed within the limits of the general cookie acceptance settings but only retained for the current session false: Third-party cookies are allowed within the limits of the general cookie acceptance and retention settings (default) true: Allow Firefox to handle Captive Portals (a router man-in-the-middle that intercepts page load) (default) false: Disables handling of Captive Portals in Firefox (a router man-in-the-middle that intercepts page load) true: Retrieve and display search term suggestions for search plugins that support it (default) false: Disable search suggestions true: Automatically copy contents of selections to the clipboard (default in Linux) false: Do not auto-copy selections (default everywhere else) true: Allow Firefox Hello to log domains (default) false: Disable domain logging if Firefox Hello is not entirely disabled true: Enables application reputation checks for downloaded files (default) false: Disables application reputation checks for downloaded files (it is recommended to disable browser.safebrowsing.downloads.remote.enabled from the main panel instead) true: Enable OCSP stapling (default) false: Disable OCSP stapling true: Website owners (not the issuing CA) respond to the OCSP queries false: Issuing CA respond to the OCSP queries true: Check for certificate revocations (may break some websites like YouTube) false: Do not check for certificate revocations (default) 0: Do not query OCSP from the responder server 1: Validate only certificates that specify an OCSP service URL (default) 2: Enable and use values in security.OCSP.URL and security.OCSP.signing false: Firefox is started normally (default) true: Private Browsing mode is used automatically. false: Scripts may only close windows opened by scripts (default) true: Scripts may close any window false: The popup blocker is disabled true: The popup blocker is enabled (default) false: Web pages won't be allowed to manipulate or block the context menu true: Websites may manipulate the context menu (default) 0: Never use document's fonts (set "gfx.downloadable_fonts.enabled" to true to block regular fonts, but allow downloading of glyphs/icon-fonts) 1: Allow documents to specify fonts to use (default) 2: Always use document's fonts (deprecated) false: Disable glyphs/icon-fonts (will cause the extension to not display icons) true: Enable glyphs/icon-fonts (set browser.display.use_document_fonts to 0 to block regular fonts, but allow downloading of glyphs/icon-fonts)(default) false: Disable CSS engine from blending element's content with the content of the element that is below it true: Enable CSS engine to blend element's content with the content of the element that is below it (can reveal browser's history) false: Perform DNS prefetching (default) true: Disable DNS prefetching false: Disable link prefetching true: Enable link prefetching (default) false: Disable Pocket Integration true: Allow Pocket Integration (A third-party service for managing a reading list of articles) false: Disable media device enumeration true: Enable media device enumeration. This exposes unique identifiers of all audio/video devices (default) false: Enable page thumbnail collection (default) true: Disable page thumbnail collection (look in profile/thumbnails directory - you may want to clean that out) 0: no-referrer 1: same-origin 2: strict-origin-when-cross-origin 3: no-referrer-when-downgrade (default)