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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.
Open Firefox and enter
about:config in the URL bar. Accept any warnings that may appear about accessing advanced settings.
dom.securecontext.allowlist_onions and set the value to “true”.
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 instructions below:
Click here to get the file and save the file somewhere you will not delete it. Remember where you save the file. For this example:C:\Program Files\Tor Browser\proxy.pac
Now, back in your Firefox web browser, select “Options” from the right-hand hamburger menu:
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”:
Click “OK” and 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. You can test this by going to Start9’s
.onion homepage, here.