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I've changed my home page, but it keeps switching back to my old home page after a day or two.

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I've changed my home page, but it keeps switching back to my old home page after a day or two. Both home pages are my websites, so I know there is nothing fishy with those.

I've changed my home page, but it keeps switching back to my old home page after a day or two. Both home pages are my websites, so I know there is nothing fishy with those.

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Which security software (firewall, anti-virus) do you have?

Some security software has virtualization or sandbox features that may cause problems by protecting and restoring files in the Firefox profile folder.