If came here first would have helped you with that. FYI : You will be force updated to 57. Also 52 is not safe : Going back : unfortunately 56.0.2 and below is no longer safe to use for every day use do to secuity issues, but 52.5.0 ESR is. It will continue to get security updates until May 2018, and you can download and install it from this page: https://www.mozilla.org/en-US/firefox/organizations/all/ <b>Note : Legacy Extensions will be deleted or removed in any version update after May 2018</b>. You should make a backup of your Profile before going back and just because: https://support.mozilla.org/en-US/kb/back-and-restore-information-firefox-profiles You get up to 57.0.1 again soon or to 58 soon let us know if still have issues. Please let us know if this solved your issue or if need further assistance.