Global Firefox configuration possible or need to configure for every account FF ?

[LarsClarsen]

I know how to configure FF on for every FF on every user account on follow way:
* a little bit by hand and menues (configuration will be overwritten by update and so on)
* much more possible to configure by aboout:config (configuration will be overwritten by update and so on)
* same like about config can be configured by user.js (every user need own user.js, will be not overwritten by FF update)

Question:
* Its possible to configure Firefox on LMDE on global way, p.e. in one config file for all user of LMDE PC ?

[xenopeek]

* a little bit by hand and menues (configuration will be overwritten by update and so on)
* much more possible to configure by aboout:config (configuration will be overwritten by update and so on)

What are you doing that any of those are overwritten? Your Firefox profile files do not get overwritten on update of Firefox.

You can put about:config preferences in the file /etc/firefox/syspref.js (like user.js) to apply to all users, see http://terokarvinen.com/2016/firefox-sy ... syspref-js. You can also place multiple .js files in /etc/firefox/pref/ to keep it more organized.

[LarsClarsen]

Thanks.

Thats looks like i was looking for.