Setting up Firefox with Tor on Desktop¶
This guide assumes you have completed setting up Tor. Please visit this section first before you proceed as it is required for Firefox to properly work with Tor.
about:configin the URL bar. Accept any warnings that may appear about accessing advanced settings.
dom.securecontext.whitelist_onionsand set the value to
Download a Proxy Auto Config file to inform Firefox how to use the Tor daemon running on your computer. You can get Start9’s standard file by following the OS-specific instructions below:
Click here to get the file and save the file somewhere you won’t delete it. For this example:
C:\Program Files\Tor Browser\proxy.pac
Open the Terminal App on your Mac. You can find it in your list of Applications. In the terminal, enter:
brew install wget
And then:wget -P /usr/local/etc/tor https://registry.start9labs.com/sys/proxy.pac
From a terminal, enter:
sudo wget -P /etc/tor https://registry.start9labs.com/sys/proxy.pac
Now open your Firefox web browser, and select options (Windows), or preferences (Mac/Linux):
Search for the term “proxy” in the search bar in the upper right, then select the button that says Settings…:
This should open a menu that will allow you to configure your proxy settings. Select Automatic proxy configuration URL and paste in the path to your PAC file from earlier, prefixed with
file://. For example:
file://C:/Program Files/Tor Browser/proxy.pac
Then, check the box labeled Proxy DNS when using SOCKS v5:
OKand then restart Firefox for the changes to take effect.
You’re all set! You should now be able to navigate to .onion URLs in Firefox. This means you can bookmark Cups Messenger, and use your Bitwarden Tor address in the Bitwarden Firefox Plugin.