I found this fantastic answer by @jdharrison on how to launch Tor using RSelenium on windows:
https://stackoverflow.com/a/39048970/7837376
In the new version of RSelenium, however, startServer() is defunct and its replacement rsDriver() does not take a java argument as startServer() did before.
What is the way to launch Tor as above in firefox in the new RSelenium syntax? Thanks very much (in advance)!