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file:///d:/web/index.html not valid URL

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mozilla116
mozilla116

If I enter file:///d:/web/index.html in the search box then it returns the expected web page but if I edit it into a Firefox home page shortcut then I'm told a valid URL is required. A bit of research here makes me think I need to edit policies.json but I can't find that file in Windows 10, Firefox 139.0.1. I note that the posts giving the advice are six years old and Firefox has changed greatly since then. Please could someone tell me the current method to achieve what I want?

Jonathan

If I enter file:///d:/web/index.html in the search box then it returns the expected web page but if I edit it into a Firefox home page shortcut then I'm told a valid URL is required. A bit of research here makes me think I need to edit policies.json but I can't find that file in Windows 10, Firefox 139.0.1. I note that the posts giving the advice are six years old and Firefox has changed greatly since then. Please could someone tell me the current method to achieve what I want? Jonathan

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