Configuring Firefox for Tor

  1. Open Firefox and enter about:config in the URL bar. Accept any warnings that appear

  2. Search for dom.securecontext.allowlist_onions and set the value to true:

    Firefox whitelist onions screenshot
  3. Go to the right-hand hamburger menu and select Settings:

    Firefox options screenshot
  4. Search for the term proxy in the search bar in the upper right and select Settings...:

    Firefox search screenshot
  5. Check the option labeled Use System Proxy Settings and the box labeled Proxy DNS when using SOCKS v5:

    Firefox proxy settings screenshot
  6. Click OK and restart Firefox

  7. Test that Firefox can resolve .onion URLs by visiting Start9’s Tor website: http://privacy34kn4ez3y3nijweec6w4g54i3g54sdv7r5mr6soma3w4begyd.onion.