How to change Firefox start page in domain policies?

Question

Windows

Good afternoon. Faced the following problem:
All users of the domain need to change the start page of the Firefox browser to the page of our enterprise. For IE, this is done relatively simply, through the registry, but there are difficulties with Mozilla. This browser does not store the start page in a branch, but in a file that is different for each user.
Who can tell how to do this, or at least indicate in which direction it is worth digging further. I will be very grateful.

Answer 1

Gentlemen, there are AD policies!!!
Try to use them.
And ADMX for FF has been around for a long time.
https://support.mozilla.org/si/kb/customizing-fire...

Answer 2

Switch to Google Chrome. To date, it is the only modern browser that fully supports group policies.
And now the answer to the question:

1. On a public resource, place the local-settings.js files:
   

   pref("general.config.obscure_value", 0);
   pref('general.config.filename', 'firefox.cfg');

   
   
2. And firefox.cfg:
   

   //put everything in a try/catch
   try {
     lockPref("browser.startup.homepage", "https://yandex.ru/");
   } catch(e) {
     displayError("lockedPref", e);
   }

   
   
3. Create a new GPO and go to Computer Configuration → Settings → Windows Configuration → Files.
   
4. Let's create the files one by one:
   
   local-settings.js

   Действие: Обновить
   Исходный файл: \\server\share\local-settings.js
   Конечный файл: %ProgramFiles%\Mozilla Firefox\defaults\pref\local-settings.js
   firefox.cfg

   Действие: Обновить
   Исходный файл: \\server\share\firefox.cfg
   Конечный файл: %ProgramFiles%\Mozilla Firefox\firefox.cfg
   If the 32-bit version of Firefox is used (which is no longer recommended today), then replace the variable with %ProgramFiles(x86)%.
   
5. Link the GPO to the unit and enjoy life. All other options are similar (see the about:config page for a complete list).