For technical details see our bug tracker. We are working on a fix as quickly as possible and hope to get Mozilla to exempt Tor Browser users from this feature while we are working on a new release. Needless to say, this whole behavior is highly confusing and we apologize for it. Clicking on the 'Get Firefox' button is safe and leads the user to our Tor Browser download page. This is both due to a server-side code change on Mozilla's side and an oversight by us during the ESR45 transition. Update (August 11, 10:04 UTC): Starting from a couple of hours ago Tor Browser users might see a notification box in their browser claiming that Firefox is too old providing a button to get a newer one. The internal updater should still work, though, doing a complete update. Note: Due to bug 19410, on OSX the incremental update will not be working for users who installed the previous version using the. Additionally, it bumps NoScript to 2.9.0.12, HTTPS-Everywhere to 5.2.1, disables asmjs, removes meek-google and contains a few other bug fixes. This release updates Firefox to 45.3.0esr. This release features important security updates to Firefox. Tor Browser 6.0.3 is now available from the Tor Browser Project page and also from our distribution directory.

Tor web browser for android 6.0.1