Download and place the file in the HTTPSEverywhereUserRules/ subdirectory in your Firefox profile directory. In Tor Browser bundle, the location for your profile is: {wherever you installed tbb}/Data/profile
When you're in TBB, navigate to http://4chan.org. If it doesn't switch to https automatically, then click the HTTPSEverywhere icon up in the corner, and make sure the 4chan.org rule is checked. Page should refresh, you should see that it is now https.
4chan ruleset is here: https://gitweb.torproject.org/https-everywhere.git/blob_plai...
Download and place the file in the HTTPSEverywhereUserRules/ subdirectory in your Firefox profile directory. In Tor Browser bundle, the location for your profile is: {wherever you installed tbb}/Data/profile
When you're in TBB, navigate to http://4chan.org. If it doesn't switch to https automatically, then click the HTTPSEverywhere icon up in the corner, and make sure the 4chan.org rule is checked. Page should refresh, you should see that it is now https.