about:config
Variable:/Value:
general.useragent.override Mozilla/5.0 (Windows NT 6.1; rv:45.0)
Gecko/20100101 Firefox/45.0
general.appname.override Netscape
general.appversion.override 5.0 (Windows)
general.oscpu.override Windows NT 6.1
general.platform.override Win32
general.productSub.override 20100101
general.buildID.override 0
general.useragent.vendor [enter variable - but leave value blank]
general.useragent.vendorSub [enter variable - but leave value blank]
intl.accept_languages en-us,en;q=0.5
network.http.accept.default
text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
network.http.accept-encoding gzip, deflate
If the string is not already there, create it (right click, new string). This
+ disabling js + accepting (first party) cookies + disabling DONOTRACK header
(useless feature anyway) should give you the exact same fingerprint of the
TorBB..