On my work computer I downloaded and installed FF 61.0.2 as a PortableApp. After starting, it has no SYNC button in its menu, so I cannot initiate SYNC with my other devices. I followed the solution to a similar question (https://support.mozilla.org/en-US/questions/1214040), but there is no "Firefox Account" in the left column. But at the top of the preferences page there is a message "Your organization has disabled the ability to change some options." I found out that this has to do with the config option identity.fxaccounts.enabled having a false value. Indeed, in the about:config screen, the setting "identity.fxaccounts.enabled" has the value false and its status is locked. How do I unlock this setting? What I already tried: Search the PC for mozilla.cfg and check for the statement lockPref("identity.fxaccounts.enabled", false). There is a file C:\Program Files\Mozilla Firefox\mozilla.cfg, but it does not contain the text identity.fxaccounts.enabled. In fact, there is a complete FF installation in C:\Program Files\Mozilla Firefox but this company-managed FF-version also does not have the "Sign in to sync" button. This was the reason to install the up-to-date PortableApps version in the first place. I have searched the complete C:\Program Files\Mozilla Firefox directory for the text identity.fxaccounts.enabled; the only relevant occurrence is in file browser/omni.ja: pref("identity.fxaccounts.enabled", true). (The other occurrences are read accesses.)