Tor protects you against a common form of Internet surveillance known as "traffic analysis." Traffic analysis can be used to infer who is talking to whom over a public network. Knowing the source and destination of your Internet traffic allows others to track your behavior and interests. This can impact your checkbook if, for example, an e-commerce site uses price discrimination based on your country or institution of origin. It can even threaten your job and physical safety by revealing who and where you are. For example, if you're traveling abroad and you connect to your employer's computers to check or send mail, you can inadvertently reveal your national origin and professional affiliation to anyone observing the network, even if the connection is encrypted.
What is new in this release:
This release features important security updates to Firefox. Tor Browser 8.0.3 includes newer NoScript and HTTPS Everywhere versions. Moreover, it ships with a donation banner for our end of the year campaign and includes another round of smaller fixes for Tor Browser 8 issues on Linux systems. We switched as well to a newer API for our NoScript <-> Torbutton communication, which we need for the Security Slider.