There are two issues I can think of from the top of my head. JavaScript can be used to glean additional, potentially unique, information about your system. This information can be used to identify you on subsequent visits, just like a cookie. If you are logging into these websites then they already know that you are you anyway.
However there could be an issue if these websites share this identifiable information with a third party who can then recognise you when you visit his site. This could be particularly bad if personally identifiable information such as your name is connected to one of these sites. I expect Tor browser tries to do something to limit the information available to JavaScript but you should verify that for yourself. Another issue with JavaScript is that it can be used to try and exploit security vulnerabilities in your web browser and (if successful) run malicious code on your computer. I don't think it is the end of the world if you decide to enable JavaScript, especially if it is just for a handful of services you really need. I hope this information if helpful for you to understand the risks a little better. -- tor-talk mailing list - [email protected] To unsubscribe or change other settings go to https://lists.torproject.org/cgi-bin/mailman/listinfo/tor-talk
