Private Mode is an add-on for Firefox (version 59.0 or higher). It provides a button that can be used to toggle "Private Mode": a state in which the user is protected from many forms of fingerprinting.
Currently, Private Mode:
- Enables the "privacy.resistFingerprinting" preference
- Sets "network.http.sendRefererHeader" to 0
- Disables WebGL via JavaScript injection
- Disables IndexedDB to prevent private browsing mode detection via JavaScript injection
- Disables service workers via JavaScript injection
Note that the first two settings are reset to false and 2 respectively and JavaScript is no longer injected when Private Mode is disabled.
Each of these features can also be disabled by going to the options page, which can be found from the link in about:addons.
To toggle Private Mode, click on its icon while it is in the toolbar, or press Ctrl+Alt+P (Cmd+Alt+P on MacOS).
To install Private Mode, navigate to
Releases and
download the latest signed.xpi file. Then, go to about:addons,
then "Extensions", then click on the gear in the upper right corner of the page.
Choose "Install Add-on From File", and select the signed.xpi file you just
downloaded.