Hello,

please see if you have any user.js file in your profile, if it is present then please go through this article to know how to delete it How to fix preferences that won't save

moreover you can provide us with more information, so we can better assist you. Use the Troubleshooting Information page to help fix Firefox issues

Those two prefs provide information about the current Firefox version and shouldn't cause a problem with the home page setting as set via the browser.startup.homepage pref.

• browser.startup.homepage_override.bildID
• browser.startup.homepage_override.mstone

You can check in "Windows Control Panel > Programs" for recently installed programs to see if any suspicious software shows up.

• Control Panel > Programs > Programs and Features > Uninstall or change a program
• Click the Installed column to sort by this heading

If you have software like Advanced SystemCare that might reset some files to older versions to protect these files against changes then check the settings or uninstall this software.

Don't these strings override my homepage the whole time? It even says "override" so I suspected these two strings. Anyway nothing of your tips worked for me... What may cause my problem?

PS: sorry, I completely forgot about this question...