Hello 2Fre,

any luck if you delete in your profile folder the User.js file you have ?

The user.js file does not exist by default. If you create the file, forget it, if you have not create the file then delete the User.js file, to see if the problem goes away (some programs create and write in the file also).

thank you

An add-on or a add-ware program could also give you this problem.

Start Firefox in Safe Mode {web link} While you are in safe mode;

Type about:preferences<Enter> in the address bar

Select Advanced > General. Look for and turn off Use Hardware Acceleration.

Poke around safe web sites. Are there any problems?

Then restart.

I ve tried dboth but the prob is still there. When I change the home page, the file prefs.js is correctly updated. I close FF and when I restart it, the Home Page field value is back to “Mozzila Firefox Start Page” Like if it is reset at each start of Firefox.

I ve tried also to delete the user.js and prefs.js files but the issue is still there. Each time I restart Firefox the homepage is reverted back to the default mozilla firefox one. :(

See also:

• http://kb.mozillazine.org/Preferences_not_saved

There is software like Advanced SystemCare with its Surfing Protection feature that can protect files in the Firefox profile folder against changes. If you have such software then check the settings or uninstall this software.

Boot the computer in Windows Safe Mode with network support (press F8 on the boot screen) as a test.

• http://www.bleepingcomputer.com/tutorials/how-to-start-windows-in-safe-mode/

Once you have the system the way you want it;

Settings Guard for Firefox {web link} Detects and resets changes to settings that are frequently done by add-ons and application installers.

How do I see settings changed, specified by Settings Guard for Firefox ? Thanks

Settings Guard Detects and resets changes to settings that are frequently done by add-ons and application installers.

Settings Guard does not change anything. It restores setting that were changed.

Bookmark and use this; Mozilla Search Reset {web link} This add-on is very simple: on installation, it backs up and then resets your search preferences and home page to their default values, and then uninstalls itself. This affects the search bar, URL bar searches, and the home page.

Ok I ve found the solution. My problem was coming from the Search engine ecosia add on. Once I ve disabled it, the probleme doesn't appear anymore. Strange as my default homepage is the ecosia search engine one, and was replaced by the default mozilla start page... Thanks to all for your help