libotr.so and libgcrypt.so are using RPATH
$ readelf -d ./TorBrowser/Data/Browser/profile.default/extensions/ctypes-otr@tormessenger/chrome/content/libgcrypt.so | grep RPATH
0x000000000000000f (RPATH) Library rpath: [/var/tmp/dist/libgpg-error/lib]
$ readelf -d ./TorBrowser/Data/Browser/profile.default/extensions/ctypes-otr@tormessenger/chrome/content/libotr.so | grep RPATH
0x000000000000000f (RPATH) Library rpath: [/var/tmp/dist/libgcrypt/lib:/var/tmp/dist/libgpg-error/lib]